feat: add last update time at /benchmarks page, clse fastify#176

scripts/download-benchmarks.js

@@ -44,12 +44,14 @@ async function execute({ downloadUrl, outputFile }) {
 async function downloadBenchmarks(githubUrl) {
   const data = await getDataAsJSON(githubUrl)
   if (isValidBenchmark(data)) {
-    return buildBenchmarksJSON(data)
+    const date = await getBenchmarkDate();
+    return buildBenchmarksJSON(data, date);
   }
 
   log.warn('Fetched file contains `N/A` data. Searching for previous revision')
 
   const commits = await getCommits()
+  let i = 0;
   for (let commit in commits) {
     const commitSha = commits[commit]
     log.debug(`Checking commit %s`, commitSha)
@@ -59,13 +61,20 @@ async function downloadBenchmarks(githubUrl) {
 
     const data = await getBlob(benchmarlUrl)
     if (isValidBenchmark(data)) {
-      return buildBenchmarksJSON(data)
+      const date = await getBenchmarkDate(i);
+      return buildBenchmarksJSON(data, date);
     }
+    i++;
   }
 
   throw new Error('Unable to find a valid benchmark result')
 }
 
+async function getBenchmarkDate(benchmarkCommitNumber=0) {
+  const commits = await getDataAsJSON(`${GITHUB_BASE_URL}/commits?path=benchmark-results.json&per_page=10`);
+  return commits[benchmarkCommitNumber] ? commits[benchmarkCommitNumber].commit.committer.date : 'Unknown';
+}
+
 const getCommits = async () => {
   const commits = await getDataAsJSON(`${GITHUB_BASE_URL}/commits?path=benchmark-results.json&per_page=10`)
   return commits.map((commit) => commit.sha)
@@ -87,13 +96,14 @@ const getBlob = async (blobUrl) => {
   return JSON.parse(decodedContent)
 }
 
-function buildBenchmarksJSON(data) {
+function buildBenchmarksJSON(data, date = 'Unknown') {
   const maxSpeed = data
     .filter(({ requests }) => !isNaN(requests))
     .map(({ requests }) => parseInt(requests))
     .reduce((max, req) => (req > max ? req : max), 0)
 
   const json = {
+    date,
     reference: maxSpeed,
     frameworks: arrayDefaultFrameworks.map((framework) => {
       const item = data.find(({ name }) => name == framework.tag)

src/pages/benchmarks.mdx

@@ -16,13 +16,17 @@ export function BenchmarkSection() {
   ))
 }
 
+export function BenchMarkDate() {
+    return benchmarksData.date === 'Unknown' ? 'Unknown' : (new Date(benchmarksData.date)).toLocaleDateString('en-US', {  year: 'numeric', month: 'long', day: 'numeric' });
+}
+
 <HeroBanner title="Benchmarks" />
 
 Leveraging our experience with Node.js performance, Fastify has been built from the ground up to be **as fast as possible**.
 
 All the code used for our benchmarks is [available on GitHub](https://github.com/fastify/benchmarks/).
 
-Here's a brief summary on how Fastify overhead performed against the some other well known Node.js web frameworks:
+Here's a brief summary on how Fastify overhead performed against the some other well known Node.js web frameworks (last updated on <BenchMarkDate />):
 
 <BenchmarkSection />