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tmp.js
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tmp.js
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const { PassThrough } = require('stream');
// THIRD EXPERIMENT
console.info('\n********** THIRD EXPERIMENT **********');
const source3 = new PassThrough();
const target3 = new PassThrough();
// stall target3
const chunk = Buffer.allocUnsafe(1000);
let chunks = 1;
while (target3.write(chunk)) chunks++;
console.info(`${chunks} chunks of ${chunk.length} bytes to stall target3`);
// `Readable.pipe()` PAUSES the source if the target needs drain (only in
// version >= v14.17.0) and it does not resume it after drain
console.info(`source3 before pipe. Paused: ${source3.isPaused()}`);
source3.pipe(target3);
console.info(`source3 after pipe. Paused: ${source3.isPaused()}`);
target3.on('drain', () => {
console.info('target3 drained');
console.info(`source3 after drain. Paused: ${source3.isPaused()}`);
console.info(source3.readableFlowing);
});
target3.on('data', () => {});