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speed up sliceTo when end == sentinel

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xdBronch 2023-12-10 13:56:39 -05:00 • committed by Veikka Tuominen
parent d525c59808
commit 6ebeb85abd
1 changed files with 4 additions and 1 deletions
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5
lib/std/mem.zig
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@ -861,7 +861,10 @@ fn lenSliceTo(ptr: anytype, comptime end: std.meta.Elem(@TypeOf(ptr))) usize {
},
.Many => if (ptr_info.sentinel) |sentinel_ptr| {
const sentinel = @as(*align(1) const ptr_info.child, @ptrCast(sentinel_ptr)).*;
// We may be looking for something other than the sentinel,
if (sentinel == end) {
return indexOfSentinel(ptr_info.child, end, ptr);
}
// We're looking for something other than the sentinel,
// but iterating past the sentinel would be a bug so we need
// to check for both.
var i: usize = 0;