zig

commit 16fa255f48ae2d290bc26ceb41489f2c3e21b96d (tree)
parent 7854a52a6b8ba541e302c5466f61e0970e5d6062
Author: Marc Tiehuis <marc@tiehu.is>
Date:   Wed, 21 Aug 2019 21:34:42 +1200

Inline full slice hashing

This gives moderate speed improvements when hashing small keys.
The crc/adler/fnv inlining did not provide enough speed up to warrant
the change.

OLD:

wyhash
  small keys: 2277 MiB/s [c14617a1e3800000]
siphash(1,3)
  small keys:  937 MiB/s [b2919222ed400000]
siphash(2,4)
  small keys:  722 MiB/s [3c3d974cc2800000]
fnv1a
  small keys: 1580 MiB/s [70155e1cb7000000]
adler32
  small keys: 1898 MiB/s [00013883ef800000]
crc32-slicing-by-8
  small keys: 2323 MiB/s [0035bf3dcac00000]
crc32-half-byte-lookup
  small keys:  218 MiB/s [0035bf3dcac00000]

NEW:

wyhash
  small keys: 2775 MiB/s [c14617a1e3800000]
siphash(1,3)
  small keys: 1086 MiB/s [b2919222ed400000]
siphash(2,4)
  small keys:  789 MiB/s [3c3d974cc2800000]
fnv1a
  small keys: 1604 MiB/s [70155e1cb7000000]
adler32
  small keys: 1856 MiB/s [00013883ef800000]
crc32-slicing-by-8
  small keys: 2336 MiB/s [0035bf3dcac00000]
crc32-half-byte-lookup
  small keys:  218 MiB/s [0035bf3dcac00000]

Diffstat:
M
std/hash/siphash.zig
 | 
4
++--
M
std/hash/wyhash.zig
 | 
4
++--

2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/std/hash/siphash.zig b/std/hash/siphash.zig
@@ -152,8 +152,8 @@ fn SipHash(comptime T: type, comptime c_rounds: usize, comptime d_rounds: usize)
 
         pub fn hash(key: []const u8, input: []const u8) T {
             var c = Self.init(key);
-            c.update(input);
-            return c.final();
+            @inlineCall(c.update, input);
+            return @inlineCall(c.final);
         }
     };
 }
diff --git a/std/hash/wyhash.zig b/std/hash/wyhash.zig
@@ -116,8 +116,8 @@ pub const Wyhash = struct {
 
     pub fn hash(seed: u64, input: []const u8) u64 {
         var c = Wyhash.init(seed);
-        c.update(input);
-        return c.final();
+        @inlineCall(c.update, input);
+        return @inlineCall(c.final);
     }
 };