From f21cce4b6929222724c3b1097242850c58712620 Mon Sep 17 00:00:00 2001
From: Mike <45243121+tankf33der@users.noreply.github.com>
Date: Sat, 20 Dec 2025 18:18:36 +0200
Subject: [PATCH] rand.wyrand: switch to using the original C._wymix() as a
 performance optimisation (#26051)

---
 vlib/rand/wyrand/wyrand.js.v  | 13 +++++++++++++
 vlib/rand/wyrand/wyrand.v     | 13 -------------
 vlib/rand/wyrand/z_wyrand.c.v | 14 ++++++++++++++
 3 files changed, 27 insertions(+), 13 deletions(-)

diff --git a/vlib/rand/wyrand/wyrand.js.v b/vlib/rand/wyrand/wyrand.js.v
index 1e5d4b442..27f0583c0 100644
--- a/vlib/rand/wyrand/wyrand.js.v
+++ b/vlib/rand/wyrand/wyrand.js.v
@@ -1,3 +1,16 @@
 module wyrand
 
+import hash
+
 pub fn (mut r WyRandRNG) free() {}
+
+@[ignore_overflow; inline]
+pub fn (mut rng WyRandRNG) u64() u64 {
+	unsafe {
+		mut seed1 := rng.state
+		seed1 += wyp0
+		rng.state = seed1
+		return hash.wymum(seed1 ^ wyp1, seed1)
+	}
+	return 0
+}
diff --git a/vlib/rand/wyrand/wyrand.v b/vlib/rand/wyrand/wyrand.v
index 6db79bb69..6a792fd67 100644
--- a/vlib/rand/wyrand/wyrand.v
+++ b/vlib/rand/wyrand/wyrand.v
@@ -3,7 +3,6 @@
 // that can be found in the LICENSE file.
 module wyrand
 
-import hash
 import rand.buffer
 import rand.seed
 
@@ -81,18 +80,6 @@ pub fn (mut rng WyRandRNG) u32() u32 {
 	return u32(ans)
 }
 
-// u64 returns a pseudorandom 64bit int in range `[0, 2⁶⁴)`.
-@[ignore_overflow; inline]
-pub fn (mut rng WyRandRNG) u64() u64 {
-	unsafe {
-		mut seed1 := rng.state
-		seed1 += wyp0
-		rng.state = seed1
-		return hash.wymum(seed1 ^ wyp1, seed1)
-	}
-	return 0
-}
-
 // block_size returns the number of bits that the RNG can produce in a single iteration.
 @[inline]
 pub fn (mut rng WyRandRNG) block_size() int {
diff --git a/vlib/rand/wyrand/z_wyrand.c.v b/vlib/rand/wyrand/z_wyrand.c.v
index aa897c26e..f95e87632 100644
--- a/vlib/rand/wyrand/z_wyrand.c.v
+++ b/vlib/rand/wyrand/z_wyrand.c.v
@@ -1,7 +1,21 @@
 module wyrand
 
+fn C._wymix(u64, u64) u64
+
 // free should be called when the generator is no longer needed
 @[unsafe]
 pub fn (mut rng WyRandRNG) free() {
 	unsafe { free(rng) }
 }
+
+// u64 returns a pseudorandom 64bit int in range `[0, 2⁶⁴)`.
+@[ignore_overflow; inline]
+pub fn (mut rng WyRandRNG) u64() u64 {
+	unsafe {
+		mut seed1 := rng.state
+		seed1 += wyp0
+		rng.state = seed1
+		return C._wymix(seed1 ^ wyp1, seed1)
+	}
+	return 0
+}
-- 
2.39.5