Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

100

SEO

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

1.36 s

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

8.55 s

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

106 ms

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

0.046

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

4.06 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.

10.39 s

Page Load Progression

841 ms

1.7 s

2.5 s

3.4 s

4.2 s

5.0 s

5.9 s

6.7 s

Checks

5 PASS 3 REVIEW 5 FIX

Page Weight Budget

Action

19.3 MB transferred, 411 requests

FIX

19.3 MB transferred, 411 requests

Page weighs 42.2 MB (19.3 MB transferred)

Images are 6.8 MB — compress or use modern formats

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

Got: 6.8 MB

JavaScript is 1.9 MB — consider code splitting or lazy loading

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

Got: 1.9 MB

Fonts are 329 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 329 KB

411 HTTP requests — consider bundling or reducing

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

Estimated 4.0 g CO2 per page load

19.3 MB transferred

411 requests

4.0 g CO2 per page load

Other 9.6 MiB 50%

Images 6.8 MiB 35%

JavaScript 1.9 MiB 10%

Fonts 329.1 KiB 2%

Other 317.9 KiB 2%

HTML 196.6 KiB 1%

CSS 53.0 KiB 0%

Other 35.9 KiB 0%

Other 1.4 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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

Third-Party Impact

Action

63% third-party, 0 ms blocking

FIX

63% third-party, 0 ms blocking

Third-party code accounts for 63% of page weight (12.1 MiB of 19.3 MiB)

Third-party blocking time is low (0 ms)

37%

63%

First-party Third-party

JS Execution Cost

Action

4504ms total JS execution

FIX

4504ms total JS execution

https://globalnews.ca/: 1048ms CPU time

https://f7e98148-cb09-4cf1-9b9f-b5aee3465d6e.edge....: 636ms CPU time

Unattributable: 476ms CPU time

https://securepubads.g.doubleclick.net/pagead/mana...: 388ms CPU time

https://imasdk.googleapis.com/js/sdkloader/ima3_da...: 172ms CPU time

Third-party scripts: 3207ms (71% of total)

Main Thread Breakdown

Script Evaluation 58% Other 18% Script Parsing & Compilation 9% Style & Layout 8% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
https://globalnews.ca/	1048ms	492ms	13ms	1st
https://f7e98148-cb09-4cf1-9b9f-b5aee3465d6e.edge.permutive.app/f7e98148-cb09-4cf1-9b9f-b5aee3465d6e-web.js	636ms	321ms	67ms	3rd
Unattributable	476ms	49ms	0ms	3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097963	388ms	307ms	26ms	3rd
https://imasdk.googleapis.com/js/sdkloader/ima3_dai.js	172ms	139ms	14ms	3rd
https://ssl.p.jwpcdn.com/player/v/8.36.2/provider.hlsjs.js	170ms	87ms	9ms	3rd
https://assets.adobedtm.com/b75837a7c3df/3f6a47431290/launch-9ae152758693.min.js?ver=0.0.1	157ms	124ms	21ms	3rd
https://videoplayer.smdg.ca/8.0.8/videoplayer.min.js	143ms	84ms	35ms	3rd
https://globalnews.ca/wp-content/themes/shaw-globalnews/assets/dist/js/main.bundle.js?ver=YzJOt5nno93vEvWUJ9bBXKcH63c%3D	141ms	111ms	1ms	1st
https://pagead2.googlesyndication.com/pagead/managed/js/activeview/current/ufs_web_display.js	136ms	116ms	14ms	3rd

Showing top 10 of 22 scripts

JS Bundles

Action

168 scripts, 1.4 MB unused

FIX

168 scripts, 1.4 MB unused

https://imasdk.googleapis.com/js/sdkloader/ima3_da...: 115 KB unused (64%)

Consider code splitting or tree shaking to reduce unused code.

https://ssl.p.jwpcdn.com/player/v/8.36.2/provider....: 68 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

https://widgets.outbrain.com/outbrain.js: 58 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

https://widgets.outbrain.com/outbrain.js: 58 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=&l=dat...: 56 KB unused (66%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.4 MB

1411 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://imasdk.googleapis.com/js/sdkloader/ima3_dai.js	180 KB	115 KB (64%)	✓	3rd
https://ssl.p.jwpcdn.com/player/v/8.36.2/provider.hlsjs.js	126 KB	68 KB (54%)	✓	3rd
https://widgets.outbrain.com/outbrain.js	110 KB	58 KB (54%)	✓	3rd
https://widgets.outbrain.com/outbrain.js	0 KB	58 KB (54%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=&l=dataLayer	0 KB	56 KB (66%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=&l=dataLayer	85 KB	56 KB (66%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=&l=dataLayer	0 KB	56 KB (66%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=&l=dataLayer	0 KB	56 KB (66%)	✓	3rd
https://videoplayer.smdg.ca/8.0.8/videoplayer.min.js	120 KB	56 KB (47%)	✓	3rd
https://videoplayer.smdg.ca/8.0.8/videoplayer.min.js	0 KB	56 KB (47%)	✓	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

Page Weight Inventory

Action

411 resources · 19.3 MB · 1.4 MB savings available

FIX

411 resources · 19.3 MB · 1.4 MB savings available

Page weight 18.3 MB over 1MB target

Got: 19.3 MB Expected: ≤ 1 MB

~1.4 MB of savings available

225 third-party resources (63% of weight)

7 resources over 200KB

411 resources · 19.3 MiB · 225 third-party 18.3 MiB over 1MB target

Media 50% · 9.6 MiB

Image 36% · 6.9 MiB

JavaScript 10% · 1.9 MiB

Document 2% · 426.0 KiB

Font 2% · 329.1 KiB

Other 1% · 100.1 KiB

CSS 0% · 53.0 KiB

~1.4 MiB of savings available

Remove unused JavaScript: 1.4 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

411 resources			19.3 MiB

Image Optimization

72 images, 0 KB saveable

REVIEW

72 images, 0 KB saveable

All images are well-optimized

72 images 293 KB

0 oversized -0 KB

32 legacy format

0 missing dimensions CLS risk

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

HTTP Caching

private

REVIEW

private

Cache-Control header is set

Got: private

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

14 fonts (329 KB)

PASS

14 fonts (329 KB)

14 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

329 KB total

Render-blocking

of 14

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

roboto-regular.woff woff swap

Size 92 KB

Load time 19 ms

Start 711 ms