diff options
Diffstat (limited to 'src/common/wchar.c')
| -rw-r--r-- | src/common/wchar.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/src/common/wchar.c b/src/common/wchar.c index 1e6e198bf27..fa8854d9e9f 100644 --- a/src/common/wchar.c +++ b/src/common/wchar.c @@ -1919,10 +1919,11 @@ pg_utf8_verifystr(const unsigned char *s, int len) uint32 state = BGN; /* - * Sixteen seems to give the best balance of performance across different - * byte distributions. + * With a stride of two vector widths, gcc will unroll the loop. Even if + * the compiler can unroll a longer loop, it's not worth it because we + * must fall back to the byte-wise algorithm if we find any non-ASCII. */ -#define STRIDE_LENGTH 16 +#define STRIDE_LENGTH (2 * sizeof(Vector8)) if (len >= STRIDE_LENGTH) { |