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fiber.c: optimize string concatenation in fiber_to_s for better performance

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Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2025-08-11 23:44:41 +09:00
parent f167ae8145
commit 28d94e336c
1 changed files with 7 additions and 1 deletions
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mrbgems/mruby-fiber/src/fiber.c
+7 -1
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@@ -379,7 +379,13 @@ fiber_to_s(mrb_state *mrb, mrb_value self)
fiber_check(mrb, self);
const struct RFiber *f = fiber_ptr(self);
mrb_value s = mrb_str_new_lit(mrb, "#<");
/* Cache status to avoid redundant lookups */
enum mrb_fiber_state status = f->cxt->status;
/* Pre-allocate buffer - 150 bytes handles typical fiber strings */
mrb_value s = mrb_str_buf_new(mrb, 150);
mrb_str_cat_lit(mrb, s, "#<");
mrb_value cname = mrb_class_path(mrb, mrb_class_real(mrb_class(mrb, self)));
if (mrb_nil_p(cname)) {
mrb_str_cat_lit(mrb, s, "Fiber:");