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feat(rosetta): propagate max heap size to worker threads #3002

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Sep 28, 2021
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feat(rosetta): propagate max heap size to worker threads #3002

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7 changes: 7 additions & 0 deletions packages/jsii-rosetta/lib/commands/extract.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import * as os from 'os';
import * as path from 'path';
import * as ts from 'typescript';
import * as v8 from 'v8';

import { loadAssemblies, allTypeScriptSnippets } from '../jsii/assemblies';
import * as logging from '../logging';
Expand Down Expand Up @@ -210,6 +211,12 @@ async function workerBasedTranslateAll(
): Promise<import('./extract_worker').TranslateResponse> {
return new Promise((resolve, reject) => {
const wrk = new worker.Worker(path.join(__dirname, 'extract_worker.js'), {
resourceLimits: {
// Note: V8 heap statistics are expressed in bytes, so we divide by 1MiB (1,048,576 bytes)
maxOldGenerationSizeMb: Math.ceil(
v8.getHeapStatistics().heap_size_limit / 1_048_576,
),
},
workerData: request,
});
wrk.on('message', resolve);
Expand Down