diff options
Diffstat (limited to 'src/sort')
| -rw-r--r-- | src/sort/search_test.go | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/src/sort/search_test.go b/src/sort/search_test.go index 49813eaecb..b6ab900abe 100644 --- a/src/sort/search_test.go +++ b/src/sort/search_test.go @@ -5,6 +5,7 @@ package sort_test import ( + "math/bits" "runtime" . "sort" stringspkg "strings" @@ -135,13 +136,10 @@ func TestFind(t *testing.T) { // log2 computes the binary logarithm of x, rounded up to the next integer. // (log2(0) == 0, log2(1) == 0, log2(2) == 1, log2(3) == 2, etc.) func log2(x int) int { - n := 0 - for p := 1; p < x; p += p { - // p == 2**n - n++ + if x < 1 { + return 0 } - // p/2 < x <= p == 2**n - return n + return bits.Len(uint(x - 1)) } func TestSearchEfficiency(t *testing.T) { |