6be2868787
This PR adds the benchmarking script I've been using for #40251 to measure the performance improvements that we make to the Edge SSR runtime. This tool: - uploads two version of the benchmarking project to Vercel, one with the latest canary and the one with your current local changes in dist (don't forget to build!) - runs some tests against the published url to measure TTFB - displays a nice chart and table What this doesn't do (yet): - allow you to choose which URL to compare - allow you to change the measured metric - run a battery of differnet test ## Bug - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Errors have a helpful link attached, see `contributing.md` ## Feature - [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR. - [ ] Related issues linked using `fixes #number` - [ ] Integration tests added - [ ] Documentation added - [ ] Telemetry added. In case of a feature if it's used or not. - [ ] Errors have a helpful link attached, see `contributing.md` https://user-images.githubusercontent.com/11064311/191270204-04447e20-5a40-43a9-bcda-b7eaeb3d270a.mov ## Documentation / Examples - [ ] Make sure the linting passes by running `pnpm lint` - [ ] The "examples guidelines" are followed from [our contributing doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md) Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>
41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
import https from 'https'
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import timer from '@szmarczak/http-timer'
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// a wrapper around genAsyncRequest that will retry the request 5 times if it fails
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export async function genRetryableRequest(url) {
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let retries = 0
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while (retries < 5) {
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try {
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return await genAsyncRequest(url)
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} catch (err) {}
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retries++
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await new Promise((r) => setTimeout(r, 1000))
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}
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throw new Error(`Failed to fetch ${url}, too many retries`)
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}
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// a wrapper around http.request that is enhanced with timing information
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async function genAsyncRequest(url) {
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return new Promise((resolve, reject) => {
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const request = https.get(url)
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timer(request)
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request.on('response', (response) => {
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let body = ''
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response.on('data', (data) => {
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body += data
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})
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response.on('end', () => {
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resolve({
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...response.timings.phases,
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cold: !body.includes('HOT'),
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})
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})
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response.on('error', (err) => {
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reject(err)
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})
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})
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request.on('error', (err) => {
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reject(err)
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})
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})
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}
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