Server Timing

Bun

Start by installing @bit-js/web-utils:

bun add @bit-js/web-utils

Use it like so:

import { serverTiming } from '@bit-js/web-utils';

// Set the resolve time
app.set('resolveTime', serverTiming.metric('resolveTime'));

// Set the result later
app.defer((res, ctx) => {
  if(!(res instanceof Response)) return ctx.end();
  ctx.resolveTime.append(res.headers);
});

// Do route handling normally
app.post('/new', (ctx) => {
  // Do something
  resolveSomething(ctx);
});

Deno

Use it like so:

import { serverTiming } from 'npm:@bit-js/web-utils';

// Set the resolve time
app.set('resolveTime', serverTiming.metric('resolveTime'));

// Set the result later
app.defer((res, ctx) => {
  if(!(res instanceof Response)) return ctx.end();
  ctx.resolveTime.append(res.headers);
});

// Do route handling normally
app.post('/new', (ctx) => {
  // Do something
  resolveSomething(ctx);
});

To specify a description for the metric:

serverTiming.metric('db_query', 'The time taken to finish a database query');