Optimization for String#* for 1-byte strings
MODIFY
src/string.c
src/string.c
@@ -870,7 +870,9 @@ mrb_str_times(mrb_state *mrb, mrb_value self)
str2 = str_new(mrb, 0, len);
str_with_class(mrb, str2, self);
p = RSTR_PTR(str2);
- if (len > 0) {
+ if (len == 1) {
+ memset(p, RSTRING_PTR(self)[0], len);
+ } else if (len > 0) {
n = RSTRING_LEN(self);
memcpy(p, RSTRING_PTR(self), n);
while (n <= len/2) {

Optimization for String#* for 1-byte strings