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test: improve performance of test-crypto-timing-safe-equal-benchmarks

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Using `eval()` rather than `require()`'ing a fixture and deleting it
from the cache results in a roughtly 10x improvement in running time.

Fixes: https://github.com/nodejs/node/issues/25984
Refs: https://github.com/nodejs/node/issues/26229

PR-URL: https://github.com/nodejs/node/pull/26237
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
This commit is contained in:
Rich Trott 2019-02-21 03:26:27 -08:00
parent d1011f6bbf
commit eb9e6c0157
2 changed files with 14 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
test/fixtures/crypto-timing-safe-equal-benchmark-func.js vendored
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@ -1,17 +0,0 @@
'use strict';
const assert = require('assert');
module.exports = (compareFunc, firstBufFill, secondBufFill, bufSize) => {
const firstBuffer = Buffer.alloc(bufSize, firstBufFill);
const secondBuffer = Buffer.alloc(bufSize, secondBufFill);
const startTime = process.hrtime();
const result = compareFunc(firstBuffer, secondBuffer);
const endTime = process.hrtime(startTime);
// Ensure that the result of the function call gets used, so it doesn't
// get discarded due to engine optimizations.
assert.strictEqual(result, firstBufFill === secondBufFill);
return endTime[0] * 1e9 + endTime[1];
};

25
test/pummel/test-crypto-timing-safe-equal-benchmarks.js
View File

@ -6,21 +6,24 @@ if (!common.hasCrypto)
if (!common.enoughTestMem)
common.skip('memory-intensive test');
const fixtures = require('../common/fixtures');
const assert = require('assert');
const crypto = require('crypto');
const BENCHMARK_FUNC_PATH =
`${fixtures.fixturesDir}/crypto-timing-safe-equal-benchmark-func`;
function runOneBenchmark(...args) {
const benchmarkFunc = require(BENCHMARK_FUNC_PATH);
const result = benchmarkFunc(...args);
function runOneBenchmark(compareFunc, firstBufFill, secondBufFill, bufSize) {
return eval(`
const firstBuffer = Buffer.alloc(bufSize, firstBufFill);
const secondBuffer = Buffer.alloc(bufSize, secondBufFill);
// Don't let the comparison function get cached. This avoid a timing
// inconsistency due to V8 optimization where the function would take
// less time when called with a specific set of parameters.
delete require.cache[require.resolve(BENCHMARK_FUNC_PATH)];
return result;
const startTime = process.hrtime();
const result = compareFunc(firstBuffer, secondBuffer);
const endTime = process.hrtime(startTime);
// Ensure that the result of the function call gets used, so it doesn't
// get discarded due to engine optimizations.
assert.strictEqual(result, firstBufFill === secondBufFill);
endTime[0] * 1e9 + endTime[1];
`);
}
function getTValue(compareFunc) {