1 page analysed for https://en.wikipedia.beta.wmcl...

Tested 2026-09-20 15:09:18 using Chrome (runtime settings)

Pages passing every check
0 / 1
The page needs work; the dots show where.https://en.wikipedia.beta.wmcloud.org/wiki/Barack_Obama
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Largest Contentful Paintwhen the main content showedpassesgood under 2.5 spoor over 4 s2.028 smedian
Cumulative Layout Shifthow much the layout jumpedpassesgood under 0.1poor over 0.250.038median
Total Blocking Timehow long the main thread was blockedpassesgood under 200 mspoor over 600 ms95 msmedian
Speed Indexhow quickly content filled the screenpassesgood under 3.4 spoor over 5.8 s2.143 smedian
Page weightbytes shipped over the wirepassesgood under 1.5 MBpoor over 2.9 MB846.9 KBmedian
Coach performance scorehow well pages follow performance adviceflaggedpoor under 70good over 9085median · worst 82
The dot on each track is your page; click it to open the page report.

Page by page

Worst first · median of the runs · click a page for its full report
VerdictPageLCPCLSTBTSpeed IndexWeightCoach
needs workhttps://en.wikipedia.beta.wmcloud.org/wiki/Barack_Obama2.028 s0.03895 ms2.143 s846.9 KB82→

How the median page rendered

Visual milestones
  • 1.924 sFirst Contentful Paint
  • 1.933 sFirst Visual Change
  • 2.028 sLargest Contentful Paint
  • 2.143 sSpeed Index
  • 3.333 sLast Visual Change
  • 3.541 sFully Loaded

What the median page is made of

Bytes and requests by content type
Transfer846.9 KB
html364.2 KBjavascript359.5 KBimage70.6 KBcss30.6 KBsvg21.9 KB
Requests40
svg18image11javascript7css2html1

Coach's notes

Median scores out of 100
  • Performance85
  • Best practice68
  • Privacy71
  • Overall77

CPU

Median across all pages
  • Long tasks4
  • Long task time295 ms
  • Max Potential FID113 ms
Where the time went
  • Style & layout574 ms
  • Running JavaScript314 ms
  • Other browser work198 ms
  • Parsing HTML & CSS178 ms
  • Paint & composite114 ms
  • Garbage collection19 ms
  • Parsing & compiling JavaScript4 ms