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objexcept: Optimize using messages without formatting substitutions. 

They are directly cast to str object, skipping allocation of formatting
buffer.
This commit is contained in:
Paul Sokolovsky 2015-02-15 22:19:30 +03:00
parent 3077fbff26
commit 29c4f92e13
1 changed files with 13 additions and 9 deletions
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8
py/objexcept.c
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@ -348,18 +348,22 @@ mp_obj_t mp_obj_new_exception_msg_varg(const mp_obj_type_t *exc_type, const char
if (fmt == NULL) {
// no message
assert(0);
} else {
if (strchr(fmt, '%') == NULL) {
// no formatting substitutions, avoid allocating vstr.
o->args->items[0] = mp_obj_new_str(fmt, strlen(fmt), false);
} else {
// render exception message and store as .args[0]
// TODO: optimize bufferbloat
va_list ap;
vstr_t vstr;
vstr_init(&vstr, 16);
va_list ap;
va_start(ap, fmt);
vstr_vprintf(&vstr, fmt, ap);
va_end(ap);
o->args->items[0] = mp_obj_new_str_from_vstr(&mp_type_str, &vstr);
}
}
}
return o;
}