From d092cb6e8ec9afc9c0433fcc42df57d3aa621f02 Mon Sep 17 00:00:00 2001 From: Dmitry Stogov Date: Wed, 18 Mar 2015 17:11:21 +0300 Subject: [PATCH] Second prefetch is useless, because cahce line on modern x86 CPUs is 64 bytes long. --- ext/opcache/zend_accelerator_util_funcs.c | 1 - 1 file changed, 1 deletion(-) diff --git a/ext/opcache/zend_accelerator_util_funcs.c b/ext/opcache/zend_accelerator_util_funcs.c index 8b301bf429..20b097b202 100644 --- a/ext/opcache/zend_accelerator_util_funcs.c +++ b/ext/opcache/zend_accelerator_util_funcs.c @@ -770,7 +770,6 @@ static zend_always_inline void fast_memcpy(void *dest, const void *src, size_t s do { _mm_prefetch(dqsrc + 4, _MM_HINT_NTA); - _mm_prefetch(dqsrc + 6, _MM_HINT_NTA); __m128i xmm0 = _mm_load_si128(dqsrc + 0); __m128i xmm1 = _mm_load_si128(dqsrc + 1); -- 2.40.0