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GeezerVison is showing github.com — repl: add benchmarks · nodejs/node@cd1e6ce

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  • benchmark/repl
    • completion.js
    • creation.js
    • evaluate.js
    • process-lines.js
    • reset-context.js
  • test/benchmark
    • test-benchmark-repl.js
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‎benchmark/repl/completion.js‎

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+53Lines changed: 53 additions & 0 deletions
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'use strict';
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const common = require('../common.js');
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const repl = require('node:repl');
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const { PassThrough, Writable } = require('node:stream');
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const bench = common.createBenchmark(main, {
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n: [5e3],
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query: [
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'cons',
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'console.lo',
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'Buffer.prototype.wri',
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"require('f",
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],
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useGlobal: [0, 1],
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});
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function main({ n, query, useGlobal }) {
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const input = new PassThrough();
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const output = new Writable({ write(c, e, cb) { cb(); } });
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const server = new repl.REPLServer({
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input,
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output,
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terminal: false,
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useGlobal: !!useGlobal,
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});
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// Inspector callbacks do not keep the event loop alive on their own.
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const keepAlive = setInterval(() => {}, 0x7fffffff);
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let remaining = n;
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function complete() {
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server.complete(query, onComplete);
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}
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function onComplete(err) {
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if (err) {
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throw err;
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}
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if (--remaining === 0) {
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bench.end(n);
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clearInterval(keepAlive);
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server.close();
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return;
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}
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setImmediate(complete);
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}
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bench.start();
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setImmediate(complete);
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}
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‎benchmark/repl/creation.js‎

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+39Lines changed: 39 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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'use strict';
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const common = require('../common.js');
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const repl = require('node:repl');
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const { PassThrough, Writable } = require('node:stream');
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const bench = common.createBenchmark(main, {
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n: [500],
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preview: [0, 1],
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terminal: [0, 1],
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useGlobal: [0, 1],
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}, {
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combinationFilter: ({ preview, terminal }) => !!terminal || !preview,
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});
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function main({ n, preview, terminal, useGlobal }) {
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const inputs = Array.from({ length: n }, () => new PassThrough());
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const outputs = Array.from(
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{ length: n },
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() => new Writable({ write(c, e, cb) { cb(); } }),
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);
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const servers = new Array(n);
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bench.start();
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for (let i = 0; i < n; i++) {
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servers[i] = new repl.REPLServer({
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input: inputs[i],
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output: outputs[i],
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preview: !!preview,
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terminal: !!terminal,
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useGlobal: !!useGlobal,
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});
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}
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bench.end(n);
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for (const server of servers) {
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server.close();
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}
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}
Collapse file

‎benchmark/repl/evaluate.js‎

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+57Lines changed: 57 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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'use strict';
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const common = require('../common.js');
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const repl = require('node:repl');
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const { PassThrough, Writable } = require('node:stream');
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const bench = common.createBenchmark(main, {
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n: [2e4],
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code: [
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'1 + 1',
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'({ answer: 42 })',
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'Promise.resolve(42)',
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'await Promise.resolve(42)',
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],
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mode: ['sloppy', 'strict'],
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useGlobal: [0, 1],
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});
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function main({ n, code, mode, useGlobal }) {
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const input = new PassThrough();
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const output = new Writable({ write(c, e, cb) { cb(); } });
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const server = new repl.REPLServer({
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input,
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output,
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replMode: mode === 'strict' ?
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repl.REPL_MODE_STRICT :
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repl.REPL_MODE_SLOPPY,
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terminal: false,
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useGlobal: !!useGlobal,
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});
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// Inspector callbacks do not keep the event loop alive on their own.
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const keepAlive = setInterval(() => {}, 0x7fffffff);
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let remaining = n;
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function evaluate() {
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server.eval(`${code}\n`, server.context, 'repl', onEvaluate);
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}
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function onEvaluate(err) {
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if (err) {
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throw err;
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}
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if (--remaining === 0) {
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bench.end(n);
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clearInterval(keepAlive);
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server.close();
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return;
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}
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setImmediate(evaluate);
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}
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bench.start();
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setImmediate(evaluate);
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}
Collapse file

‎benchmark/repl/process-lines.js‎

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+52Lines changed: 52 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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1+
'use strict';
2+
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const common = require('../common.js');
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const repl = require('node:repl');
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const { PassThrough, Writable } = require('node:stream');
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const bench = common.createBenchmark(main, {
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n: [1e4],
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code: [
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'1 + 1\n',
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'Promise.resolve(42)\n',
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],
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mode: ['sloppy', 'strict'],
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terminal: [0, 1],
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useGlobal: [0, 1],
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});
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function main({ n, code: inputCode, mode, terminal, useGlobal }) {
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const input = new PassThrough();
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const output = new Writable({ write(c, e, cb) { cb(); } });
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const server = new repl.REPLServer({
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input,
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output,
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replMode: mode === 'strict' ?
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repl.REPL_MODE_STRICT :
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repl.REPL_MODE_SLOPPY,
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terminal: !!terminal,
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useGlobal: !!useGlobal,
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});
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const originalEval = server.eval;
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// TTY input dispatch can briefly have no other active event loop handles.
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const keepAlive = setInterval(() => {}, 0x7fffffff);
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let remaining = n;
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// eslint-disable-next-line node-core/func-name-matching
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server.eval = function REPLEval(code, context, file, callback) {
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originalEval(code, context, file, function onEvaluate() {
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const result = Reflect.apply(callback, this, arguments);
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if (--remaining === 0) {
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bench.end(n);
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clearInterval(keepAlive);
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server.close();
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} else {
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setImmediate(() => input.write(inputCode));
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}
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return result;
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});
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};
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bench.start();
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input.write(inputCode);
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}
Collapse file

‎benchmark/repl/reset-context.js‎

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+26Lines changed: 26 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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'use strict';
2+
3+
const common = require('../common.js');
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const repl = require('node:repl');
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const { PassThrough, Writable } = require('node:stream');
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const bench = common.createBenchmark(main, {
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n: [1e3],
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});
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function main({ n }) {
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const input = new PassThrough();
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const output = new Writable({ write(c, e, cb) { cb(); } });
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const server = new repl.REPLServer({
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input,
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output,
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terminal: false,
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});
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bench.start();
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for (let i = 0; i < n; i++) {
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server.resetContext();
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}
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bench.end(n);
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server.close();
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}
Collapse file

‎test/benchmark/test-benchmark-repl.js‎

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+8Lines changed: 8 additions & 0 deletions
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'use strict';
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const common = require('../common');
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const runBenchmark = require('../common/benchmark');
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common.skipIfInspectorDisabled();
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runBenchmark('repl', { NODEJS_BENCHMARK_ZERO_ALLOWED: 1 });

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