mirror of
https://github.com/nodejs/node.git
synced 2025-04-29 22:40:57 +00:00
06bb6b42b3
Add experimental support for loading snapshots in the embedder API by adding a public opaque wrapper for our `SnapshotData` struct and allowing embedders to pass it to the relevant setup functions. Where applicable, use these helpers to deduplicate existing code in Node.js’s startup path. This has shown a 40 % startup performance increase for a real-world application, even with the somewhat limited current support for built-in modules. The documentation includes a note about no guarantees for API or ABI stability for this feature while it is experimental. PR-URL: https://github.com/nodejs/node/pull/45888 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
'use strict';
|
||
const common = require('../common');
|
||
const fixtures = require('../common/fixtures');
|
||
const tmpdir = require('../common/tmpdir');
|
||
const assert = require('assert');
|
||
const child_process = require('child_process');
|
||
const path = require('path');
|
||
const fs = require('fs');
|
||
|
||
tmpdir.refresh();
|
||
common.allowGlobals(global.require);
|
||
common.allowGlobals(global.embedVars);
|
||
|
||
function resolveBuiltBinary(bin) {
|
||
let binary = `out/${common.buildType}/${bin}`;
|
||
if (common.isWindows) {
|
||
binary += '.exe';
|
||
}
|
||
return path.resolve(__dirname, '..', '..', binary);
|
||
}
|
||
|
||
const binary = resolveBuiltBinary('embedtest');
|
||
const standaloneNodeBinary = resolveBuiltBinary('node');
|
||
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['console.log(42)'])
|
||
.stdout.toString().trim(),
|
||
'42');
|
||
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['console.log(embedVars.nön_ascıı)'])
|
||
.stdout.toString().trim(),
|
||
'🏳️🌈');
|
||
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['console.log(42)'])
|
||
.stdout.toString().trim(),
|
||
'42');
|
||
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['throw new Error()']).status,
|
||
1);
|
||
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['process.exitCode = 8']).status,
|
||
8);
|
||
|
||
|
||
const fixturePath = JSON.stringify(fixtures.path('exit.js'));
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, [`require(${fixturePath})`, 92]).status,
|
||
92);
|
||
|
||
// Basic snapshot support
|
||
{
|
||
const snapshotFixture = fixtures.path('snapshot', 'echo-args.js');
|
||
const blobPath = path.join(tmpdir.path, 'embedder-snapshot.blob');
|
||
const buildSnapshotArgs = [snapshotFixture, 'arg1', 'arg2'];
|
||
const runEmbeddedArgs = ['--embedder-snapshot-blob', blobPath, 'arg3', 'arg4'];
|
||
|
||
fs.rmSync(blobPath, { force: true });
|
||
assert.strictEqual(child_process.spawnSync(standaloneNodeBinary, [
|
||
'--snapshot-blob', blobPath, '--build-snapshot', ...buildSnapshotArgs,
|
||
], {
|
||
cwd: tmpdir.path,
|
||
}).status, 0);
|
||
const spawnResult = child_process.spawnSync(binary, ['--', ...runEmbeddedArgs]);
|
||
assert.deepStrictEqual(JSON.parse(spawnResult.stdout), {
|
||
originalArgv: [standaloneNodeBinary, ...buildSnapshotArgs],
|
||
currentArgv: [binary, ...runEmbeddedArgs],
|
||
});
|
||
}
|
||
|
||
// Create workers and vm contexts after deserialization
|
||
{
|
||
const snapshotFixture = fixtures.path('snapshot', 'create-worker-and-vm.js');
|
||
const blobPath = path.join(tmpdir.path, 'embedder-snapshot.blob');
|
||
|
||
fs.rmSync(blobPath, { force: true });
|
||
assert.strictEqual(child_process.spawnSync(standaloneNodeBinary, [
|
||
'--snapshot-blob', blobPath, '--build-snapshot', snapshotFixture,
|
||
], {
|
||
cwd: tmpdir.path,
|
||
}).status, 0);
|
||
assert.strictEqual(
|
||
child_process.spawnSync(binary, ['--', '--embedder-snapshot-blob', blobPath]).status,
|
||
0);
|
||
}
|