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``` $ dd if=/dev/zero bs=65536 count=500000 | ./stdio # C baseline 500000+0 records in 500000+0 records out 32768000000 bytes transferred in 4.126087 secs (7941664827 bytes/sec) c: size 32768000000 reads 500000 blocksize 65536 ``` ``` $ dd if=/dev/zero bs=65536 count=500000 | deno run stdio.js # Deno 500000+0 records in 500000+0 records out 32768000000 bytes transferred in 4.279032 secs (7657806719 bytes/sec) deno: size 32768000000 reads 500000 blocksize 65536 ```
16 lines
476 B
JavaScript
16 lines
476 B
JavaScript
// From https://github.com/just-js/benchmarks/tree/main/01-stdio
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
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const blocksize = parseInt(Deno.args[0] || 65536);
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const buf = new Uint8Array(blocksize);
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let size = 0;
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let reads = 0;
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let n = Deno.stdin.readSync(buf);
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while (n > 0) {
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reads++;
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size += n;
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n = Deno.stdin.readSync(buf);
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}
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if (n < 0) throw new Error("Bad Read");
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console.log(`size ${size} reads ${reads} blocksize ${blocksize}`);
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