Commit 16fa255f48

Marc Tiehuis <marc@tiehu.is>
2019-08-21 11:34:42
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]
master
1 parent 7854a52
Changed files (2)
std
hash
siphash.zig
wyhash.zig
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);
         }
     };
 }
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);
     }
 };