From 0501e066b51b659371739008c20e80642532497a Mon Sep 17 00:00:00 2001
From: Marc Tiehuis <marctiehuis@gmail.com>
Date: Tue, 24 Apr 2018 23:54:27 +1200
Subject: [PATCH] crypto throughput test now uses os.time module

---
 std/crypto/throughput_test.zig | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

diff --git a/std/crypto/throughput_test.zig b/std/crypto/throughput_test.zig
index d086b555e9..0756f9a4eb 100644
--- a/std/crypto/throughput_test.zig
+++ b/std/crypto/throughput_test.zig
@@ -1,17 +1,13 @@
 // Modify the HashFunction variable to the one wanted to test.
 //
-// NOTE: The throughput measurement may be slightly lower than other measurements since we run
-// through our block alignment functions as well. Be aware when comparing against other tests.
-//
 // ```
-// zig build-exe --release-fast --library c throughput_test.zig
+// zig build-exe --release-fast throughput_test.zig
 // ./throughput_test
 // ```
 
 const std = @import("std");
-const c = @cImport({
-    @cInclude("time.h");
-});
+const time = std.os.time;
+const Timer = time.Timer;
 const HashFunction = @import("md5.zig").Md5;
 
 const MiB = 1024 * 1024;
@@ -28,13 +24,14 @@ pub fn main() !void {
     var h = HashFunction.init();
     var offset: usize = 0;
 
-    const start = c.clock();
+    var timer = try Timer.start();
+    const start = timer.lap();
     while (offset < BytesToHash) : (offset += block.len) {
         h.update(block[0..]);
     }
-    const end = c.clock();
+    const end = timer.read();
 
-    const elapsed_s = f64(end - start) / f64(c.CLOCKS_PER_SEC);
+    const elapsed_s = f64(end - start) / time.ns_per_s;
     const throughput = u64(BytesToHash / elapsed_s);
 
     try stdout.print("{}: {} MiB/s\n", @typeName(HashFunction), throughput / (1 * MiB));