rubygems.org
Ranks Overall #1,456 Developer Tooling #55 Package Managers #11
Data from Oct 9, 2026, 2:57 AM UTC old Measured every 2 days · 21 runs since Aug 25, 2026
Elsewhere:
PageSpeed Insights ·
Calibre ·
Treo ·
CrUX Vis ·
Tame the Bots ·
Scoring Calculator ·
Wayback Machine
Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).
Stack
Ru
Hosted by
RubyGems.org
Filmstrip LAB Throttled
How the page drew during the measured load, at 8 points across 16.16 s. Compare this filmstrip against another site.
-
2.02 s
-
4.04 s
-
4.18 s
-
8.08 s
-
10.10 s
-
12.12 s
-
14.14 s
-
16.16 s
Lighthouse Scores LAB Simulated
73
Performance
↓ -4 (-5.2%)
92
Accessibility
no change
100
Best Practices
no change
91
SEO
no change
Metrics LAB FIELD
Core Web Vitals:
passing
3 of 3 assessed from real Chrome users.
Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-09 → 2026-10-06), url-level.
| Metric | Lab Simulated | Field | |||
|---|---|---|---|---|---|
| Value | Change / range | Trend | p75 | Distribution | |
| LCP CWV Largest Contentful Paint | 4.61 s poor | ↑ +386 ms (+9.1%) significant 3.93 s – 4.69 s | 1.16 s good | 93.9% 3.1% 3% | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | 86 ms good | 95.9% 3.1% 1% | |
| CLS CWV Cumulative Layout Shift | 0.028 good | → no change 0.026 – 0.028 | 0 good | 99.2% 0.3% 0.4% | |
| TBT Total Blocking Time | 0 ms good | → no change 0 ms – 0 ms | n/a | — | |
| FCP First Contentful Paint | 4.29 s poor | ↑ +369 ms (+9.4%) significant 3.63 s – 4.39 s | 1.17 s good | 87.6% 8.1% 4.3% | |
| Speed Index | 4.29 s needs work | ↑ +369 ms (+9.4%) significant 3.63 s – 4.39 s | n/a | — | |
| TTFB Time to First Byte | 628 ms good | ↑ +3 ms (+0.5%) 617 ms – 642 ms | 728 ms good | 77.5% 17.7% 4.8% | |
LCP Subparts LAB Throttled
The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.
element render delay
3.61 s
time to first byte
573 ms
LCP LAB Simulated vs LCP FIELD
Lab
4.61 s
Field p75
1.16 s
The lab LCP is 3.97× the field p75 — real users likely have above-average hardware or network connectivity.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 603 kB | ↑ +798 B (+0.1%) 597 kB – 603 kB | |
| Requests | 45 | → no change 45 – 47 | |
| Third-party Weight | 37.4 kB | ↑ +348 B (+0.9%) 37.0 kB – 37.4 kB | |
| Third-party CPU | 0 ms | → no change 0 ms – 0 ms | |
| Unused JS | 188 kB | → no change 188 kB – 188 kB | |
| Unused CSS | 0 B | → no change 0 B – 0 B |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| script | 57.4% | 328 kB | 36 | |
| stylesheet | 23.6% | 135 kB | 3 | |
| other | 11.3% | 64.5 kB | 1 | |
| font | 6.3% | 36.3 kB | 3 | |
| document | 1.4% | 8.0 kB | 1 | |
| Total | 603 kB | 45 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Google Fonts | 37.4 kB | 0 ms | |
| Total | 37.4 kB | 0 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
0% of pixels differ — they are identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 663 ms | ↑ +187 ms (+39.4%) significant 475 ms – 836 ms | |
| Long Tasks | 2 | ↑ +1 (+100%) significant 1 – 3 | |
| DOM Elements | 183 | → no change 183 – 199 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 14 | → no change 14 – 17 | |
| A11y Failures | 2 | → no change 2 – 3 | |
| A11y Failing Nodes | 14 | → no change 14 – 16 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| other | 49% | 323 ms | |
| style layout | 21% | 136 ms | |
| script evaluation | 19% | 129 ms | |
| parse HTML | 7% | 48 ms | |
| paint composite render | 2% | 14 ms | |
| script parse compile | 1% | 9 ms | |
| garbage collection | 1% | 4 ms | |
| Total | 663 ms |
Axe violations axe-core 4.13.0, full rule set
14 violating nodes across 2 rules, 262 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
-
serious
link-name— Links must have discernible text 9 nodesOffending elements (5 of 9)
-
.space-x-4 > a:nth-child(1)<a href="https://github.com/rubygems/rubygems.org"> <svg class="h-6 w-6 flex-shrink-0 stroke-current stroke-0 fill-current " height="24" width="24" aria-hidden="true" role="graphics-symbol"><use href… -
.space-x-4 > a:nth-child(2)<a href="https://ruby.social/users/rubygems"> <svg class="h-6 w-6 flex-shrink-0 stroke-current stroke-0 fill-current " height="24" width="24" aria-hidden="true" role="graphics-symbol"><use href="/ass… -
.p-1[href$="rubycentral.org/"]<a href="https://rubycentral.org/" class="p-1"><svg class="h-15 w-15 flex-shrink-0 stroke-current stroke-0 fill-current " height="60" width="60" aria-hidden="true" role="graphics-symbol"><use href="/… -
a[href$="aws.amazon.com/"]<a href="https://aws.amazon.com/" class="p-1"><svg class="h-15 w-15 flex-shrink-0 stroke-current stroke-0 fill-current " height="60" width="60" aria-hidden="true" role="graphics-symbol"><use href="/a… -
.p-1:nth-child(3)<a href="https://dnsimple.link/resolving-rubygems" class="p-1"><svg class="h-15 w-15 flex-shrink-0 stroke-current stroke-0 fill-current " height="60" width="60" aria-hidden="true" role="graphics-symb…
-
-
serious
color-contrast— Elements must meet minimum color contrast ratio thresholds 5 nodesOffending elements
-
.text-orange-500 > .text-\[2\.5rem\].sm\:text-\[3\.5rem\].lg\:text-\[5rem\]<span class="text-[2.5rem] sm:text-[3.5rem] lg:text-[5rem]">RubyGems</span> -
a[href$="download"] > span<span>Install RubyGems</span> -
.max-w-4xl > a[href$="rubycentral.org/"]<a href="https://rubycentral.org/">contributing here</a> -
a[href$="supporters"] > span<span>See our sponsors</span> -
.bg-\[\#FFE2D3\].p-8.dark\:bg-orange-900 > .min-h-14.gap-2.text-white > span<span>Donate now</span>
-
Accessibility failures 2 of 26 audits
-
link-name— Links do not have a discernible name 9 nodes -
color-contrast— Background and foreground colors do not have a sufficient contrast ratio. 5 nodes
SEO failures 1 of 8 audits
-
meta-description— Document does not have a meta description
Hygiene
HTTPS
HSTS
CSP
Clickjacking protection
Origin isolation
Trusted Types
bfcache
h2
Measurement log
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 2026-10-03 | 1.16 s | 86 ms | 0 | 1.16 s | 729 ms |
| 2026-09-26 | 1.16 s | 86 ms | 0 | 1.16 s | 728 ms |
| 2026-09-19 | 1.16 s | 88 ms | 0 | 1.16 s | 730 ms |
| 2026-09-12 | 1.24 s | 92 ms | 0 | 1.25 s | 814 ms |
| 2026-09-05 | 1.57 s | 106 ms | 0 | 1.58 s | 1.07 s |
| 2026-08-29 | 1.54 s | 109 ms | 0 | 1.58 s | 1.15 s |
| 2026-08-22 | 1.65 s | 112 ms | 0 | 1.67 s | 1.15 s |
| 2026-08-15 | 1.52 s | 112 ms | 0 | 1.54 s | 1.12 s |
| 2026-08-08 | 1.80 s | 128 ms | 0 | 1.85 s | 1.18 s |
| 2026-08-01 | 1.80 s | 144 ms | 0 | 1.85 s | 1.12 s |
| 2026-07-25 | 1.97 s | 152 ms | 0 | 2.02 s | 1.08 s |
| 2026-07-18 | 2.06 s | 153 ms | 0 | 2.10 s | 1.12 s |
Runs
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 9, 2026, 2:57 AM UTC | 73 | 4.61 s | 0.028 | 0 ms | 603 kB | 3/3 | ±2 | 2,443 -2% | 45s |
|
|
| Oct 6, 2026, 10:59 PM UTC | 77 | 4.22 s | 0.028 | 0 ms | 603 kB | 3/3 | ±8 | 3,349 +35% | 43.4s |
|
|
| Oct 3, 2026, 8:43 PM UTC | 72 | 4.67 s | 0.028 | 0 ms | 603 kB | 2/3 | ±8 | 3,000 +21% | 42.9s |
|
|
| Oct 1, 2026, 6:52 AM UTC | 72 | 4.69 s | 0.027 | 0 ms | 602 kB | 3/3 | ±2 | 2,439 -2% | 52s |
|
|
| Sep 29, 2026, 4:53 AM UTC | 73 | 4.52 s | 0.028 | 0 ms | 603 kB | 3/3 | ±2 | 2,395 -4% | 47.8s |
|
|
| Sep 25, 2026, 5:53 AM UTC | 72 | 4.67 s | 0.028 | 0 ms | 598 kB | 3/3 | ±0 | 2,482 0% | 45.3s |
|
|
| Sep 23, 2026, 12:08 AM UTC | 72 | 4.69 s | 0.028 | 0 ms | 597 kB | 3/3 | ±8 | 2,399 -4% | 46.4s |
|
|
| Sep 20, 2026, 11:12 PM UTC | 76 | 4.28 s | 0.026 | 0 ms | 598 kB | 3/3 | ±8 | 2,244 -10% | 45.8s |
|
|
| Sep 18, 2026, 1:31 PM UTC | 72 | 4.67 s | 0.028 | 0 ms | 597 kB | 3/3 | ±1 | 2,405 -3% | 46.7s |
|
|
| Sep 16, 2026, 3:55 AM UTC | 72 | 4.67 s | 0.028 | 0 ms | 597 kB | 3/3 | ±0 | 2,495 0% | 45.9s |
|
|
| Sep 14, 2026, 1:00 AM UTC | 72 | 4.67 s | 0.028 | 0 ms | 597 kB | 3/3 | ±0 | 2,438 -2% | 46s |
|
|
| Sep 11, 2026, 11:07 PM UTC | 72 | 4.68 s | 0.028 | 0 ms | 597 kB | 3/3 | ±1 | 2,442 -2% | 46.5s |
|
|
| Sep 9, 2026, 8:35 PM UTC | 79 | 3.93 s | 0.027 | 0 ms | 597 kB | 3/3 | ±1 | 3,376 +36% | 22s |
|
|
| Sep 7, 2026, 7:12 PM UTC | 76 | 4.23 s | 0.028 | 0 ms | 597 kB | 3/3 | ±8 | 2,488 0% | 23.5s |
|
|
| Sep 5, 2026, 3:16 AM UTC | 72 | 4.69 s | 0.028 | 0 ms | 597 kB | 3/3 | ±1 | 2,292 -8% | 23.4s |
|
|
| Sep 4, 2026, 12:55 AM UTC | 79 | 3.93 s | 0.028 | 0 ms | 599 kB | 3/3 | ±5 | 3,102 +25% | 22.6s |
|
|
| Sep 2, 2026, 11:05 PM UTC | 79 | 3.94 s | 0.028 | 0 ms | 599 kB | 3/3 | ±4 | 2,317 -7% | 23.5s |
|
|
| Sep 1, 2026, 8:45 PM UTC | 72 | 4.67 s | 0.026 | 0 ms | 599 kB | 3/3 | ±0 | 3,014 +21% | 21.5s |
|
|
| Aug 31, 2026, 6:03 PM UTC | 72 | 4.68 s | 0.028 | 0 ms | 599 kB | 3/3 | ±0 | 2,336 -6% | 23.7s |
|
|
| Aug 26, 2026, 7:03 PM UTC | 72 | 4.67 s | 0.028 | 0 ms | 599 kB | 3/3 | ±0 | 2,956 +19% | 22.1s |
|
|
| Aug 25, 2026, 4:36 PM UTC | 72 | 4.68 s | 0.028 | 0 ms | 599 kB | 3/3 | ±1 | 2,501 +1% | 23.5s |
|