From 6982c74e11ec8294ed5bd53d2a9d316d7e20e7d2 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
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/README.md |  9 +++++++++
 cli/bench/stdio/stdio.c   | 29 +++++++++++++++++++++++++++++
 cli/bench/stdio/stdio.js  | 16 ++++++++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 cli/bench/stdio/README.md
 create mode 100644 cli/bench/stdio/stdio.c
 create mode 100644 cli/bench/stdio/stdio.js

(limited to 'cli')

diff --git a/cli/bench/stdio/README.md b/cli/bench/stdio/README.md
new file mode 100644
index 000000000..b2d4875ac
--- /dev/null
+++ b/cli/bench/stdio/README.md
@@ -0,0 +1,9 @@
+## `stdio` benchmarks
+
+Compile the C baseline and run the benchmark:
+
+```bash
+cc stdio.c -o stdio -O3
+time dd if=/dev/zero bs=65536 count=500000 | ./stdio
+time dd if=/dev/zero bs=65536 count=500000 | deno run stdio.js
+```
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 <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+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
diff --git a/cli/bench/stdio/stdio.js b/cli/bench/stdio/stdio.js
new file mode 100644
index 000000000..0663d6fd7
--- /dev/null
+++ b/cli/bench/stdio/stdio.js
@@ -0,0 +1,16 @@
+// From https://github.com/just-js/benchmarks/tree/main/01-stdio
+// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
+
+const blocksize = parseInt(Deno.args[0] || 65536);
+const buf = new Uint8Array(blocksize);
+let size = 0;
+let reads = 0;
+
+let n = Deno.stdin.readSync(buf);
+while (n > 0) {
+  reads++;
+  size += n;
+  n = Deno.stdin.readSync(buf);
+}
+if (n < 0) throw new Error("Bad Read");
+console.log(`size ${size} reads ${reads} blocksize ${blocksize}`);
-- 
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