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https://staples.ca

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
7
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

13.31 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

25.58 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

10.41 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.013

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

15.08 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

64.63 s

Page Load Progression

1.1 s
2.1 s
3.1 s
4.2 s
5.2 s
6.3 s
7.3 s
8.4 s
Checks
16
7 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
13.6 MB transferred, 661 requests
FIX
13.6 MB transferred, 661 requests
Critical::
Page weighs 29.6 MB (13.6 MB transferred)
Warning::
Images are 6.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.3 MB
Warning::
JavaScript is 4.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 4.3 MB
Warning::
661 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.9 g CO2 per page load
13.6 MB / 2.4 MB budget
13.6 MB transferred
661 requests
2.9 g CO2 per page load
Images 6.3 MiB 46%
JavaScript 4.3 MiB 31%
Other 1.7 MiB 13%
Other 823.2 KiB 6%
CSS 191.5 KiB 1%
Fonts 146.6 KiB 1%
HTML 134.8 KiB 1%
Other 114.7 KiB 1%
Other 10.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (13.6 MiB of 13.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
34232ms total JS execution
FIX
34232ms total JS execution
Warning::
https://www.staples.ca/cdn/shop/t/3675/assets/vend...: 8866ms CPU time
Warning::
https://www.staples.ca/cdn/shopifycloud/storefront...: 7184ms CPU time
Warning::
Unattributable: 3523ms CPU time
Warning::
https://www.staples.ca/: 2734ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JLJQ...: 1430ms CPU time
Warning::
Third-party scripts: 34232ms (100% of total)

Main Thread Breakdown

Script Evaluation 65% Other 19% Style & Layout 9%
ScriptTotalScriptingParse/CompileParty
https://www.staples.ca/cdn/shop/t/3675/assets/vendor-b9975e58.min.js8866ms5724ms42ms3rd
https://www.staples.ca/cdn/shopifycloud/storefront/assets/shop_events_listener-3da45d37.js7184ms6120ms2ms3rd
Unattributable3523ms390ms0ms3rd
https://www.staples.ca/2734ms252ms114ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JLJQL1E3HP1430ms1335ms55ms3rd
https://www.staples.ca/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js888ms320ms19ms3rd
https://www.staples.ca/cdn/shopifycloud/storefront/assets/storefront/load_feature-496de5fe.js724ms609ms8ms3rd
https://www.datadoghq-browser-agent.com/datadog-rum-v4.js685ms618ms20ms3rd
https://www.staples.ca/cdn-cgi/challenge-platform/scripts/jsd/main.js472ms421ms3ms3rd
https://connect.facebook.net/signals/config/175358999513349?v=2.9.293&r=stable&domain=www.staples.ca&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C161453ms402ms29ms3rd

Showing top 10 of 55 scripts

F
JS Bundles
Action
169 scripts, 2.2 MB unused
FIX
169 scripts, 2.2 MB unused
Warning::
https://www.staples.ca/cdn/shop/t/3675/assets/vend...: 648 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.staples.ca/cdn/shop/t/3675/assets/inde...: 180 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 178 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 178 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 178 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.2 MB
2207 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.staples.ca/cdn/shop/t/3675/assets/vendor-b9975e58.min.js1051 KB648 KB (62%)✓3rd
https://www.staples.ca/cdn/shop/t/3675/assets/index-74136704.min.js362 KB180 KB (50%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB178 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB178 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB178 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB178 KB (49%)✓3rd
https://staplesca-esengage.live.exchangesolutions.com/v4/esRd-min.js292 KB146 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-JLJQL1E3HP174 KB67 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MVGTRDM&l=dataLayer130 KB67 KB (52%)✓3rd
https://www.googleoptimize.com/optimize.js?id=GTM-KWCVBZP109 KB65 KB (60%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: max-age=0, no-cache, no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, no-cache, no-store

DirectiveValueMeaning
max-age0Cache for 0 seconds
no-cache—Cache but always revalidate first
no-store—Never cache this response
C
Image Optimization
Action
166 images, 0 KB saveable
REVIEW
166 images, 0 KB saveable
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/CyQR5WBk... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/5CZ9zA0I... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/gNopGekF... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/4sJuGwwk... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/c1R7mdaG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/27cQG5i8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/6Rej5EEV... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/67k7i71q... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/5zFNSzU0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/6KdrDwyN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/3P9vh8sI... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/XrReukNh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/1XGc3nG2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/2u3WNn19... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/26zfC0Y8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/33uYOPrN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/7aQzfELo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/183Cpt3K... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/756O6zvx... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/7LFtZdh3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/3Bama9yJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/10yLQwWB... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/2yd1b0rk61ek/7zMR7Pmh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
166 images 5.9 MB
0 oversized -0 KB
28 legacy format
23 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
8 fonts (147 KB)
PASS
8 fonts (147 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

147 KB total

Render-blocking

0

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s FCP 13.3 s LCP 25.6 shttps://www.staples.ca/cdn/shop/t/3675/assets/glyphs_15-cbf68f30.ttf?8xtb3aglyphs_15-cbf68f30.ttf https://www.staples.ca/cdn/shop/t/3675/assets/glyphs_15-cbf68f30.ttf?8xtb3a — 10.3 KiB — 0 ms — font-display: swaphttps://www.staples.ca/cdn/shop/files/tt_norms_regular-webfont.woff?v=1752852089tt_norms_regular-webfon... https://www.staples.ca/cdn/shop/files/tt_norms_regular-webfont.woff?v=1752852089 — 20.2 KiB — 0 ms — font-display: swaphttps://www.staples.ca/cdn/shop/files/tt_norms_bold-webfont.woff?v=1752852089tt_norms_bold-webfont.woff https://www.staples.ca/cdn/shop/files/tt_norms_bold-webfont.woff?v=1752852089 — 20.7 KiB — 0 ms — font-display: swaphttps://www.staples.ca/cdn/shop/files/tt_norms_medium-webfont.woff?v=1752852089tt_norms_medium-webfont... https://www.staples.ca/cdn/shop/files/tt_norms_medium-webfont.woff?v=1752852089 — 20.4 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0036/4806/1509/files/tt_norms_medium-webfont.wofftt_norms_medium-webfont... https://cdn.shopify.com/s/files/1/0036/4806/1509/files/tt_norms_medium-webfont.woff — 20.5 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0036/4806/1509/files/tt_norms_bold.woff?v=1746799629tt_norms_bold.woff https://cdn.shopify.com/s/files/1/0036/4806/1509/files/tt_norms_bold.woff?v=1746799629 — 20.7 KiB — 0 ms — font-display: swap
glyphs_15-cbf68f30.ttf ttf swap
Size 10 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
tt_norms_regular-webfon... woff swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
tt_norms_bold-webfont.woff woff swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
tt_norms_medium-webfont... woff swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
tt_norms_medium-webfont... woff swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
tt_norms_bold.woff woff swap
Size 21 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~34 KB and ~68 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
661 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 34232ms · 3435KB · CA$473/mo
www.staples.ca
Other
Costly
Execution 8866ms
Transfer 1051 KB
Unused 62%
Monthly Cost CA$122/mo
www.staples.ca
Other
Costly
Execution 7184ms
Transfer 4 KB
Monthly Cost CA$99/mo
Unattributable
Other
Costly
Execution 3523ms
Transfer 0 KB
Monthly Cost CA$49/mo
www.staples.ca
Other
Costly
Execution 2734ms
Transfer 71 KB
Monthly Cost CA$38/mo
Google Tag Manager
Tag Manager
Costly
Execution 1430ms
Transfer 174 KB
Unused 39%
Monthly Cost CA$20/mo
www.staples.ca
Other
Costly
Execution 888ms
Transfer 60 KB
Unused 41%
Monthly Cost CA$12/mo
www.staples.ca
Other
Costly
Execution 724ms
Transfer 4 KB
Monthly Cost CA$10/mo
www.datadoghq-browser-agent.com
Other
Costly
Execution 685ms
Transfer 48 KB
Unused 59%
Monthly Cost CA$9/mo
www.staples.ca
Other
Costly
Execution 472ms
Transfer 0 KB
Monthly Cost CA$7/mo
Facebook Pixel
Advertising
Costly
Execution 453ms
Transfer 38 KB
Monthly Cost CA$6/mo
www.gstatic.com
Other
Costly
Execution 434ms
Transfer 0 KB
Unused 49%
Monthly Cost CA$6/mo
Segment
Analytics
Costly
Execution 380ms
Transfer 22 KB
Monthly Cost CA$5/mo
static.klaviyo.com
Other
Costly
Execution 372ms
Transfer 11 KB
Monthly Cost CA$5/mo
www.staples.ca
Other
Costly
Execution 371ms
Transfer 362 KB
Unused 50%
Monthly Cost CA$5/mo
analytics.tiktok.com
Other
Costly
Execution 291ms
Transfer 110 KB
Unused 51%
Monthly Cost CA$4/mo
static.cloudflareinsights.com
Other
Costly
Execution 241ms
Transfer 11 KB
Monthly Cost CA$3/mo
Segment
Analytics
Costly
Execution 229ms
Transfer 32 KB
Monthly Cost CA$3/mo
www.staples.ca
Other
Costly
Execution 227ms
Transfer 117 KB
Monthly Cost CA$3/mo
static.klaviyo.com
Other
Costly
Execution 226ms
Transfer 8 KB
Monthly Cost CA$3/mo
cdn-cookieyes.com
Other
Costly
Execution 217ms
Transfer 10 KB
Monthly Cost CA$3/mo
staplesca-esengage.live.exchangesolutions.com
Other
Costly
Execution 215ms
Transfer 292 KB
Unused 50%
Monthly Cost CA$3/mo
static-tracking.klaviyo.com
Other
Costly
Execution 214ms
Transfer 3 KB
Monthly Cost CA$3/mo
apps.bazaarvoice.com
Other
Costly
Execution 212ms
Transfer 2 KB
Monthly Cost CA$3/mo
Facebook Pixel
Advertising
Costly
Execution 201ms
Transfer 95 KB
Unused 34%
Monthly Cost CA$3/mo
www.staples.ca
Other
Optional
Execution 169ms
Transfer 4 KB
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 169ms
Transfer 1 KB
Monthly Cost CA$2/mo
Google Tag Manager
Tag Manager
Optional
Execution 165ms
Transfer 143 KB
Unused 35%
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 161ms
Transfer 9 KB
Monthly Cost CA$2/mo
apps.bazaarvoice.com
Other
Optional
Execution 157ms
Transfer 28 KB
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 153ms
Transfer 3 KB
Monthly Cost CA$2/mo
apps.bazaarvoice.com
Other
Optional
Execution 152ms
Transfer 44 KB
Monthly Cost CA$2/mo
static.klaviyo.com
Other
Optional
Execution 149ms
Transfer 19 KB
Monthly Cost CA$2/mo
s.pinimg.com
Other
Optional
Execution 148ms
Transfer 27 KB
Monthly Cost CA$2/mo
Google Tag Manager
Tag Manager
Optional
Execution 146ms
Transfer 130 KB
Unused 52%
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 139ms
Transfer 4 KB
Monthly Cost CA$2/mo
cdn-cookieyes.com
Other
Optional
Execution 134ms
Transfer 8 KB
Monthly Cost CA$2/mo
www.staples.ca
Other
Optional
Execution 131ms
Transfer 28 KB
Monthly Cost CA$2/mo
Segment
Analytics
Optional
Execution 129ms
Transfer 6 KB
Monthly Cost CA$2/mo
www.staples.ca
Other
Optional
Execution 121ms
Transfer 21 KB
Monthly Cost CA$2/mo
www.googleoptimize.com
Other
Optional
Execution 119ms
Transfer 109 KB
Unused 60%
Monthly Cost CA$2/mo
d.impactradius-event.com
Other
Optional
Execution 99ms
Transfer 21 KB
Monthly Cost CA$1/mo
apps.bazaarvoice.com
Other
Optional
Execution 88ms
Transfer 0 KB
Monthly Cost CA$1/mo
jsDelivr
CDN
Optional
Execution 88ms
Transfer 32 KB
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 86ms
Transfer 52 KB
Unused 61%
Monthly Cost CA$1/mo
LinkedIn Insight
Advertising
Optional
Execution 84ms
Transfer 19 KB
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 81ms
Transfer 56 KB
Unused 58%
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 79ms
Transfer 55 KB
Unused 54%
Monthly Cost CA$1/mo
Segment
Analytics
Optional
Execution 75ms
Transfer 1 KB
Monthly Cost CA$1/mo
apps.bazaarvoice.com
Other
Optional
Execution 73ms
Transfer 14 KB
Monthly Cost CA$1/mo
static.klaviyo.com
Other
Optional
Execution 67ms
Transfer 4 KB
Monthly Cost CA$1/mo
edge.curalate.com
Other
Optional
Execution 65ms
Transfer 20 KB
Monthly Cost CA$1/mo
static.klaviyo.com
Other
Optional
Execution 59ms
Transfer 3 KB
Monthly Cost CA$1/mo
static.klaviyo.com
Other
Optional
Execution 57ms
Transfer 0 KB
Monthly Cost CA$1/mo
apps.bazaarvoice.com
Other
Optional
Execution 53ms
Transfer 11 KB
Monthly Cost CA$1/mo
analytics.tiktok.com
Other
Optional
Execution 52ms
Transfer 40 KB
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • www.staples.ca adds 8866ms and costs ~CA$122/month
  • www.staples.ca adds 7184ms and costs ~CA$99/month
  • Unattributable adds 3523ms and costs ~CA$49/month
  • www.staples.ca adds 2734ms and costs ~CA$38/month
  • Google Tag Manager adds 1430ms and costs ~CA$20/month
  • www.staples.ca adds 888ms and costs ~CA$12/month
  • www.staples.ca adds 724ms and costs ~CA$10/month
  • www.datadoghq-browser-agent.com adds 685ms and costs ~CA$9/month
  • www.staples.ca adds 472ms and costs ~CA$7/month
  • Facebook Pixel adds 453ms and costs ~CA$6/month
  • www.gstatic.com adds 434ms and costs ~CA$6/month
  • Segment adds 380ms and costs ~CA$5/month
  • static.klaviyo.com adds 372ms and costs ~CA$5/month
  • www.staples.ca adds 371ms and costs ~CA$5/month
  • analytics.tiktok.com adds 291ms and costs ~CA$4/month
  • static.cloudflareinsights.com adds 241ms and costs ~CA$3/month
  • Segment adds 229ms and costs ~CA$3/month
  • www.staples.ca adds 227ms and costs ~CA$3/month
  • static.klaviyo.com adds 226ms and costs ~CA$3/month
  • cdn-cookieyes.com adds 217ms and costs ~CA$3/month
  • staplesca-esengage.live.exchangesolutions.com adds 215ms and costs ~CA$3/month
  • static-tracking.klaviyo.com adds 214ms and costs ~CA$3/month
  • apps.bazaarvoice.com adds 212ms and costs ~CA$3/month
  • Facebook Pixel adds 201ms and costs ~CA$3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.staples.ca takes 8866ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

62% of www.staples.ca's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.staples.ca takes 7184ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 3523ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.staples.ca takes 2734ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 1430ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.staples.ca takes 888ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.staples.ca takes 724ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.datadoghq-browser-agent.com takes 685ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

59% of www.datadoghq-browser-agent.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.staples.ca takes 472ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Facebook Pixel takes 453ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.gstatic.com takes 434ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Segment takes 380ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.klaviyo.com takes 372ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.staples.ca takes 371ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

analytics.tiktok.com takes 291ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

51% of analytics.tiktok.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

static.cloudflareinsights.com takes 241ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Segment takes 229ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.staples.ca takes 227ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.klaviyo.com takes 226ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn-cookieyes.com takes 217ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

staplesca-esengage.live.exchangesolutions.com takes 215ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

50% of staplesca-esengage.live.exchangesolutions.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

static-tracking.klaviyo.com takes 214ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

apps.bazaarvoice.com takes 212ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Facebook Pixel takes 201ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

52% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

60% of www.googleoptimize.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

61% of Segment's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

58% of Segment's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

54% of Segment's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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