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https://github.com/denoland/deno.git
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4380a09a05
To fix bugs around detection of when node emulation is required, we will just eagerly initialize it. The improvements we make to reduce the impact of the startup time: - [x] Process stdin/stdout/stderr are lazily created - [x] node.js global proxy no longer allocates on each access check - [x] Process checks for `beforeExit` listeners before doing expensive shutdown work - [x] Process should avoid adding global event handlers until listeners are added Benchmarking this PR (`89de7e1ff`) vs main (`41cad2179`) ``` 12:36 $ third_party/prebuilt/mac/hyperfine --warmup 100 -S none './deno-41cad2179 run ./empty.js' './deno-89de7e1ff run ./empty.js' Benchmark 1: ./deno-41cad2179 run ./empty.js Time (mean ± σ): 24.3 ms ± 1.6 ms [User: 16.2 ms, System: 6.0 ms] Range (min … max): 21.1 ms … 29.1 ms 115 runs Benchmark 2: ./deno-89de7e1ff run ./empty.js Time (mean ± σ): 24.0 ms ± 1.4 ms [User: 16.3 ms, System: 5.6 ms] Range (min … max): 21.3 ms … 28.6 ms 126 runs ``` Fixes https://github.com/denoland/deno/issues/20142 Fixes https://github.com/denoland/deno/issues/15826 Fixes https://github.com/denoland/deno/issues/20028
58 lines
2 KiB
JavaScript
58 lines
2 KiB
JavaScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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// deno-lint-ignore-file
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const internals = globalThis.__bootstrap.internals;
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const requireImpl = internals.requireImpl;
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import { nodeGlobals } from "ext:deno_node/00_globals.js";
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import "node:module";
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globalThis.nodeBootstrap = function (usesLocalNodeModulesDir, argv0) {
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initialize(usesLocalNodeModulesDir, argv0);
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};
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let initialized = false;
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function initialize(
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usesLocalNodeModulesDir,
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argv0,
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) {
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if (initialized) {
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throw Error("Node runtime already initialized");
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}
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initialized = true;
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if (usesLocalNodeModulesDir) {
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requireImpl.setUsesLocalNodeModulesDir();
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}
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const nativeModuleExports = requireImpl.nativeModuleExports;
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nodeGlobals.Buffer = nativeModuleExports["buffer"].Buffer;
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nodeGlobals.clearImmediate = nativeModuleExports["timers"].clearImmediate;
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nodeGlobals.clearInterval = nativeModuleExports["timers"].clearInterval;
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nodeGlobals.clearTimeout = nativeModuleExports["timers"].clearTimeout;
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nodeGlobals.console = nativeModuleExports["console"];
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nodeGlobals.global = globalThis;
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nodeGlobals.process = nativeModuleExports["process"];
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nodeGlobals.setImmediate = nativeModuleExports["timers"].setImmediate;
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nodeGlobals.setInterval = nativeModuleExports["timers"].setInterval;
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nodeGlobals.setTimeout = nativeModuleExports["timers"].setTimeout;
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nodeGlobals.performance = nativeModuleExports["perf_hooks"].performance;
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// FIXME(bartlomieju): not nice to depend on `Deno` namespace here
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// but it's the only way to get `args` and `version` and this point.
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internals.__bootstrapNodeProcess(argv0, Deno.args, Deno.version);
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internals.__initWorkerThreads();
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// `Deno[Deno.internal].requireImpl` will be unreachable after this line.
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delete internals.requireImpl;
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}
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function loadCjsModule(moduleName, isMain, inspectBrk) {
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if (inspectBrk) {
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requireImpl.setInspectBrk();
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}
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requireImpl.Module._load(moduleName, null, { main: isMain });
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}
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internals.node = {
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initialize,
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loadCjsModule,
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};
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