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bootstrap: optimize modules loaded in the built-in snapshot #45849

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8 changes: 5 additions & 3 deletions lib/internal/bootstrap/browser.js
Expand Up @@ -42,9 +42,11 @@ defineOperation(globalThis, 'setTimeout', timers.setTimeout);
exposeLazyInterfaces(globalThis, 'internal/abort_controller', [
'AbortController', 'AbortSignal',
]);
exposeLazyInterfaces(globalThis, 'internal/event_target', [
'EventTarget', 'Event',
]);
const {
EventTarget, Event,
} = require('internal/event_target');
exposeInterface(globalThis, 'Event', Event);
exposeInterface(globalThis, 'EventTarget', EventTarget);
exposeLazyInterfaces(globalThis, 'internal/worker/io', [
'MessageChannel', 'MessagePort', 'MessageEvent',
]);
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29 changes: 29 additions & 0 deletions lib/internal/bootstrap/switches/is_main_thread.js
Expand Up @@ -286,3 +286,32 @@ rawMethods.resetStdioForTesting = function() {
stdout = undefined;
stderr = undefined;
};

// Needed by the module loader and generally needed everywhere.
require('fs');
require('util');
require('url');

require('internal/modules/cjs/loader');
require('internal/modules/esm/utils');
require('internal/vm/module');
// Needed to refresh the time origin.
require('internal/perf/utils');
// Needed to register the async hooks.
if (internalBinding('config').hasInspector) {
require('internal/inspector_async_hook');
}
// Needed to set the wasm web API callbacks.
internalBinding('wasm_web_api');
// Needed to detect whether it's on main thread.
internalBinding('worker');
// Needed to setup source maps.
require('internal/source_map/source_map_cache');
// Needed by most execution modes.
require('internal/modules/run_main');
// Needed to refresh DNS configurations.
require('internal/dns/utils');
// Needed by almost all execution modes. It's fine to
// load them into the snapshot as long as we don't run
// any of the initialization.
require('internal/process/pre_execution');
2 changes: 1 addition & 1 deletion lib/internal/main/eval_string.js
Expand Up @@ -14,7 +14,7 @@ const {
markBootstrapComplete
} = require('internal/process/pre_execution');
const { evalModule, evalScript } = require('internal/process/execution');
const { addBuiltinLibsToObject } = require('internal/modules/cjs/helpers');
const { addBuiltinLibsToObject } = require('internal/modules/helpers');

const { getOptionValue } = require('internal/options');

Expand Down