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'use strict';
const common = require('../common.js');
const dc = require('diagnostics_channel');
const { AsyncLocalStorage } = require('async_hooks');
const http = require('http');
const bench = common.createBenchmark(main, {
apm: ['none', 'diagnostics_channel', 'patch'],
type: 'buffer',
len: 1024,
chunks: 4,
connections: [50, 500],
chunkedEnc: 1,
duration: 5,
});
function main({ apm, connections, duration, type, len, chunks, chunkedEnc }) {
const done = { none, patch, diagnostics_channel }[apm]();
const server = require('../fixtures/simple-http-server.js')
.listen(common.PORT)
.on('listening', () => {
const path = `/${type}/${len}/${chunks}/normal/${chunkedEnc}`;
bench.http({
path,
connections,
duration,
}, () => {
server.close();
if (done) done();
});
});
}
function none() {}
function patch() {
const als = new AsyncLocalStorage();
const times = [];
const { emit } = http.Server.prototype;
function wrappedEmit(...args) {
const [name, req, res] = args;
if (name === 'request') {
als.enterWith({
url: req.url,
start: process.hrtime.bigint(),
});
res.on('finish', () => {
times.push({
...als.getStore(),
statusCode: res.statusCode,
end: process.hrtime.bigint(),
});
});
}
return emit.apply(this, args);
}
http.Server.prototype.emit = wrappedEmit;
return () => {
http.Server.prototype.emit = emit;
};
}
function diagnostics_channel() {
const als = new AsyncLocalStorage();
const times = [];
const start = dc.channel('http.server.request.start');
const finish = dc.channel('http.server.response.finish');
function onStart(req) {
als.enterWith({
url: req.url,
start: process.hrtime.bigint(),
});
}
function onFinish(res) {
times.push({
...als.getStore(),
statusCode: res.statusCode,
end: process.hrtime.bigint(),
});
}
start.subscribe(onStart);
finish.subscribe(onFinish);
return () => {
start.unsubscribe(onStart);
finish.unsubscribe(onFinish);
};
}
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