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index.html
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index.html
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<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Is my host fast yet?</title>
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-22381566-4"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-22381566-4');
</script>
<link href="https://fonts.googleapis.com/css?family=Chivo:900&display=swap" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="style.css">
<style>
p, td {
font-weight: 400;
}
section {
margin-bottom: 30px;
}
small {
font-size: small;
}
dd {
margin-left: 20px;
}
td {
vertical-align: middle;
}
#results.loading {
color: #ddd;
}
#results.loading .fast {
background-color: hsla(153, 0%, 34%, 1);
color: hsla(153, 0%, 34%, 1);
}
#results.loading .avg {
background-color: hsl(44, 0%, 62%);
color: hsl(44, 0%, 62%);
}
#results.loading .slow {
background-color: hsl(4, 0%, 56%);
color: hsl(4, 0%, 56%);
}
.ttfb {
width: 60%;
text-align: right;
}
.ttfb span {
display: inline-block;
overflow: hidden;
line-height: 30px;
font-size: 0.8em;
font-weight: bold;
text-shadow: none;
color: #fff;
}
.fast {
background-color: #0aa55f;
}
.fast:hover {
outline: 1px solid #0aa55f;
}
.avg {
background-color: #fbca42;
}
.avg:hover {
outline: 1px solid #fbca42;
}
.slow {
background-color: #dd493f;
}
.slow:hover {
outline: 1px solid #dd493f;
}
@media only screen and (min-width: 768px) {
.inner {
width: 800px;
}
code {
white-space: nowrap;
}
}
@media ((-webkit-min-device-pixel-ratio: 1.5), (min-resolution: 144dpi), (min-resolution: 1.5dppx)) {
p, td {
font-weight: 300;
}
}
</style>
<link rel="shortcut icon" href="https://ismyhostfastyet.com/favicon.svg">
<link rel="canonical" href="https://ismyhostfastyet.com/">
<meta name="author" content="Rick Viscomi">
<meta name="description" content="A study of web host performance using real-world transparency data from Chrome UX Report and HTTP Archive.">
<meta property="og:title" content="Is my host fast yet?">
<meta property="og:locale" content="en_US">
<meta property="og:url" content="https://ismyhostfastyet.com/">
<meta property="og:site_name" content="Is my host fast yet?">
<script type="application/ld+json">
{
"@type": "WebSite",
"url": "https://ismyhostfastyet.com/",
"name": "ismyhostfastyet",
"headline": "Is my host fast yet?",
"@context": "http://schema.org"
}
</script>
</head>
<body>
<div id="container">
<div class="inner">
<header>
<h1>Is my host fast yet?</h1>
<h2>Real-world server response (Time to First Byte) latencies, as experienced by real-world users navigating the web.</h2>
</header>
<hr>
<section>
<h2>Leaderboard: March 2024</h2>
<form id="filter">
<label>
Sort by
<select name="sort">
<option value="fast" selected>Fast</option>
<option value="avg">Average</option>
<option value="slow">Slow</option>
<option value="platform">Host</option>
<option value="client">Client</option>
<option value="n">Websites</option>
</select>
</label>
</form>
<table>
<thead>
<th>Host</th>
<th>Client</th>
<th>Websites</th>
<th>Fast<br>(p75 < 800ms)</th>
<th>Average</th>
<th>Slow<br>(p75 >= 1800ms)</th>
</thead>
<tbody id="results" class="loading"></tbody>
</table>
</section>
<section>
<p>
See a missing hosting provider?
<a href="https://github.com/rviscomi/ismyhostfastyet/blob/master/README.md#contribute">
Please help us identify how to surface them here.
</a>
</p>
</section>
<section>
<h2>How do you measure real-world Time to First Byte?</h2>
<p>
This report is powered by <a href="http://bit.ly/chrome-ux-report">Chrome User Experience Report</a>,
which provides user experience metrics for how real-world Chrome users experience popular
destinations on the web. As a result, this report does not rely on synthentic tests of
each hosting provider, but instead provides insight into how real-world users experience
the speed of sites hosted by various providers.
</p>
<h2>What is Time to First Byte?</h2>
<p>
<a href="https://web.dev/articles/ttfb">TTFB</ttfb> is measured as the time from the start of navigation request until the time that the
client receives the first byte of the response from the server. It includes network setup time
(SSL, DNS, TCP) as well as server-side processing.
</p>
<img src="ttfb.png" loading="lazy" height="320" width="800" alt="Diagram showing TTFB as the network events from the prompt for unload to the response start">
<p>
As you can see in the <a href="https://w3c.github.io/navigation-timing/">Navigation Timing Level 2 draft spec</a>
screenshot above, the metric is equivalent to <code>performance.getEntriesByType('navigation')[0].responseStart</code>.
</p>
<h2>How do you determine: Fast, Average, Slow?</h2>
<p>
The thresholds for fast/average/slow TTFB are 800 ms as the upper limit for fast TTFB and 1800 ms as the lower limit for slow TTFB.
</p>
<p>
The 75th percentile (p75) TTFB is analyzed for each website, which is determined to be fast or slow by where it falls between those thresholds.
</p>
<p>
The percentages for each host are calculated by taking the number of websites whose p75 TTFB is fast, average, and slow, and dividing each by the total number of websites.
</p>
<h2>How frequently is this reported updated?</h2>
<p>
Chrome UX Report publishes monthly datasets on the second Tuesday and this report is updated shortly after.
</p>
<h2>How are the hosting providers detected?</h2>
<p>
Chrome UX Report does not provide an explicit dimension for which hosting provider
is associated with each origin. To perform the classification we rely on another
dataset: <a href="https://httparchive.org">HTTP Archive</a> crawls all of the origins provided
in CrUX and runs logic to identify providers based on header signatures, DNS records, and other signals.
</p>
<p>
For example, a response header of <code>X-Powered-By: HubSpot</code> for a website's HTML page indicates that
it is hosted by HubSpot.
</p>
<p>
Would you like to see a hosting provider included in this report that’s currently
not on the list? Please <a href="https://github.com/rviscomi/ismyhostfastyet/blob/master/README.md#methodology">read more about our methodology</a>
and <a href="https://github.com/rviscomi/ismyhostfastyet/">join us on GitHub</a> — we’d appreciate your help to
allow us to expand coverage of this report!
</p>
<h2>What about <em>X</em>?</h2>
<p>Good question! Please <a href="https://github.com/rviscomi/ismyhostfastyet/issues">start a discussion</a> on GitHub, so we can answer it.</p>
</section>
<footer>
ismyhostfastyet is maintained by <a href="https://twitter.com/rick_viscomi">Rick Viscomi</a>
</footer>
</div>
</div>
<script>
function makeRow(host, client, n, fast, avg, slow) {
const tr = document.createElement('tr');
let td = document.createElement('td');
td.innerText = host;
tr.appendChild(td);
td = document.createElement('td');
td.innerText = client;
tr.appendChild(td);
td = document.createElement('td');
td.innerText = isNaN(parseInt(n, 10)) ? n : (+n).toLocaleString();
tr.appendChild(td);
td = document.createElement('td');
td.setAttribute('colspan', 3);
td.className = 'ttfb';
let span = document.createElement('span');
span.className = 'fast'
span.title = `Fast: ${formatPct(fast)} of websites`;
span.style.width = `${fast * 100}%`;
span.innerText = formatPct(fast);
td.appendChild(span);
span = document.createElement('span');
span.className = 'avg'
span.title = `Average: ${formatPct(avg)} of websites`;
span.style.width = `${avg * 100}%`;
span.innerText = formatPct(avg);
td.appendChild(span);
tr.appendChild(td);
span = document.createElement('span');
span.className = 'slow'
span.title = `Slow: ${formatPct(slow)} of websites`;
span.style.width = `${slow * 100}%`;
span.innerText = formatPct(slow);
td.appendChild(span);
return tr;
}
function formatPct(n) {
return (n * 100).toFixed(0) + '%';
}
function updateResultsTable(data) {
const results = document.getElementById('results');
// Clear any stale contents.
results.innerHTML = '';
const frag = document.createDocumentFragment();
data.forEach(i => {
const tr = makeRow(i.platform, i.client, i.n, i.fast, i.avg, i.slow);
frag.appendChild(tr);
});
results.appendChild(frag);
}
function sortResults(data, field) {
if (!(field in data[0])) return data;
return data.sort((a, b) => {
const diff = b[field] - a[field];
if (isNaN(diff)) {
// Do string comparison instead.
return a[field].localeCompare(b[field]);
}
return diff;
});
}
function getRandomFiller(maxLength) {
var filler = '█';
var len = Math.ceil(Math.random() * maxLength);
return new Array(len).fill(filler).join('');
}
function getRandomDistribution() {
var fast = Math.random();
var avg = (1 - fast) * Math.random();
var slow = 1 - (fast + avg);
return [fast, avg, slow];
}
function getSortField() {
const sortField = new URL(location.href).searchParams.get('sort');
const isValid = !!document.querySelector(`#filter option[value="${sortField}"]`);
if (!isValid) {
return 'fast';
}
return sortField;
}
function updateUrlField(key, value) {
const url = new URL(location);
url.searchParams.set(key, value);
history.replaceState({}, '', url);
}
function setPlaceholderData() {
// Temporary placeholder data.
const NUM_ROWS = 46;
window.data = [];
for (var i = 0; i < NUM_ROWS; i++) {
var [fast, avg, slow] = getRandomDistribution();
window.data.push({
platform: getRandomFiller(10),
client: getRandomFiller(5),
n: getRandomFiller(1),
fast,
avg,
slow
});
}
}
function setDefaultSort(sortField) {
document.querySelector('#filter select').value = sortField;
}
function initSortHandler() {
document.getElementById('filter').addEventListener('change', (e) => {
const field = e.target.value;
gtag('event', 'sort', {'event_category': 'engagement', 'event_label': field});
updateResultsTable(sortResults(window.data, field));
updateUrlField('sort', field);
});
}
function fetchData(sortField) {
fetch('ttfb.json').then(r => r.json()).then(r => {
window.data = r;
const results = document.getElementById('results');
results.classList.remove('loading');
updateResultsTable(sortResults(r, sortField));
});
}
function init() {
const sortField = getSortField();
setDefaultSort(sortField);
initSortHandler();
// Display the placeholder data.
setPlaceholderData();
updateResultsTable(sortResults(window.data, sortField));
fetchData(sortField);
}
init();
</script>
<script type="module" src="vitals.js"></script>
</body>
</html>