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stream,benchmark: refactor use es2020 statements #44533

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stream,benchmark: refactor use es2020 statements #44533

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4025c62
stream: refactor use es2020 statement
xtx1130 Sep 6, 2022
a5dd0c9
benchmark: add stream destroy benchmark
xtx1130 Sep 7, 2022
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56 changes: 56 additions & 0 deletions benchmark/streams/destroy.js
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Original file line number Diff line number Diff line change
@@ -0,0 +1,56 @@
'use strict';
const common = require('../common.js');
const {
Duplex,
Readable,
Transform,
Writable,
} = require('stream');

const bench = common.createBenchmark(main, {
n: [1e6],
kind: ['duplex', 'readable', 'transform', 'writable']
});

function main({ n, kind }) {
switch (kind) {
case 'duplex':
new Duplex({});
new Duplex();

bench.start();
for (let i = 0; i < n; ++i)
new Duplex().destroy();
bench.end(n);
break;
case 'readable':
new Readable({});
new Readable();

bench.start();
for (let i = 0; i < n; ++i)
new Readable().destroy();
bench.end(n);
break;
case 'writable':
new Writable({});
new Writable();

bench.start();
for (let i = 0; i < n; ++i)
new Writable().destroy();
bench.end(n);
break;
case 'transform':
new Transform({});
new Transform();

bench.start();
for (let i = 0; i < n; ++i)
new Transform().destroy();
bench.end(n);
break;
default:
throw new Error('Invalid kind');
}
}
12 changes: 6 additions & 6 deletions lib/internal/streams/destroy.js
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ function destroy(err, cb) {
// With duplex streams we use the writable side for state.
const s = w || r;

if ((w && w.destroyed) || (r && r.destroyed)) {
if (w?.destroyed || r?.destroyed) {
if (typeof cb === 'function') {
cb();
}
Expand Down Expand Up @@ -128,7 +128,7 @@ function emitCloseNT(self) {
r.closeEmitted = true;
}

if ((w && w.emitClose) || (r && r.emitClose)) {
if (w?.emitClose || r?.emitClose) {
self.emit('close');
}
}
Expand All @@ -137,7 +137,7 @@ function emitErrorNT(self, err) {
const r = self._readableState;
const w = self._writableState;

if ((w && w.errorEmitted) || (r && r.errorEmitted)) {
if (w?.errorEmitted || r?.errorEmitted) {
return;
}

Expand Down Expand Up @@ -192,11 +192,11 @@ function errorOrDestroy(stream, err, sync) {
const r = stream._readableState;
const w = stream._writableState;

if ((w && w.destroyed) || (r && r.destroyed)) {
if (w?.destroyed || r?.destroyed) {
return this;
}

if ((r && r.autoDestroy) || (w && w.autoDestroy))
if (r?.autoDestroy || w?.autoDestroy)
stream.destroy(err);
else if (err) {
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
Expand Down Expand Up @@ -283,7 +283,7 @@ function emitConstructNT(stream) {
}

function isRequest(stream) {
return stream && stream.setHeader && typeof stream.abort === 'function';
return stream?.setHeader && typeof stream.abort === 'function';
}

function emitCloseLegacy(stream) {
Expand Down