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| Current File : //proc/thread-self/root/home/ubuntu/node-v16.18.1/benchmark/http/end-vs-write-end.js |
// When calling .end(buffer) right away, this triggers a "hot path"
// optimization in http.js, to avoid an extra write call.
//
// However, the overhead of copying a large buffer is higher than
// the overhead of an extra write() call, so the hot path was not
// always as hot as it could be.
//
// Verify that our assumptions are valid.
'use strict';
const common = require('../common.js');
const bench = common.createBenchmark(main, {
type: ['asc', 'utf', 'buf'],
len: [64 * 1024, 128 * 1024, 256 * 1024, 1024 * 1024],
c: [100],
method: ['write', 'end'],
duration: 5
});
function main({ len, type, method, c, duration }) {
const http = require('http');
let chunk;
switch (type) {
case 'buf':
chunk = Buffer.alloc(len, 'x');
break;
case 'utf':
chunk = 'ü'.repeat(len / 2);
break;
case 'asc':
chunk = 'a'.repeat(len);
break;
}
function write(res) {
res.write(chunk);
res.end();
}
function end(res) {
res.end(chunk);
}
const fn = method === 'write' ? write : end;
const server = http.createServer((req, res) => {
fn(res);
});
server.listen(common.PORT, () => {
bench.http({
connections: c,
duration
}, () => {
server.close();
});
});
}
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