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objstr: Add note that replace() is nicely optimized.

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Doesn't allocate memory and returns original string if no replacements are
to be made.
This commit is contained in:
Paul Sokolovsky 2015-06-26 17:33:21 +03:00
parent abfd4da287
commit f44cc517a2
1 changed files with 2 additions and 0 deletions
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2
py/objstr.c
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@ -1465,6 +1465,8 @@ not_enough_args:
return mp_obj_new_str_from_vstr(&mp_type_str, &vstr); return mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
} }
// The implementation is optimized, returning the original string if there's
// nothing to replace.
STATIC mp_obj_t str_replace(mp_uint_t n_args, const mp_obj_t *args) { STATIC mp_obj_t str_replace(mp_uint_t n_args, const mp_obj_t *args) {
assert(MP_OBJ_IS_STR_OR_BYTES(args[0])); assert(MP_OBJ_IS_STR_OR_BYTES(args[0]));