From 6982c74e11ec8294ed5bd53d2a9d316d7e20e7d2 Mon Sep 17 00:00:00 2001 From: Divy Srivastava Date: Thu, 1 Dec 2022 22:05:18 -0800 Subject: perf: use fast api for io read/write sync (#15863) ``` $ 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 ``` --- cli/bench/stdio/stdio.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 cli/bench/stdio/stdio.c (limited to 'cli/bench/stdio/stdio.c') diff --git a/cli/bench/stdio/stdio.c b/cli/bench/stdio/stdio.c new file mode 100644 index 000000000..8125a0d00 --- /dev/null +++ b/cli/bench/stdio/stdio.c @@ -0,0 +1,29 @@ +// From https://github.com/just-js/benchmarks/tree/main/01-stdio +// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license. + +#include +#include +#include +#include +#include + +int main(int argc, char *argv[]) { + unsigned int blocksize = 65536; + if (argc == 2) { + blocksize = atoi(argv[1]); + } + char buf[blocksize]; + unsigned long size = 0; + unsigned int reads = 0; + int n = read(STDIN_FILENO, buf, blocksize); + while (n > 0) { + reads++; + size += n; + n = read(STDIN_FILENO, buf, blocksize); + } + if (n < 0) { + fprintf(stderr, "read: %s (%i)\n", strerror(errno), errno); + exit(1); + } + fprintf(stdout, "size %lu reads %u blocksize %u\n", size, reads, blocksize); +} \ No newline at end of file -- cgit v1.2.3