* [PATCH] poll: avoid rb_funcall for rb_hash_clear
@ 2015-08-11 19:58 Eric Wong
0 siblings, 0 replies; only message in thread
From: Eric Wong @ 2015-08-11 19:58 UTC (permalink / raw)
To: kgio-public; +Cc: Eric Wong
rb_funcall will always be slower, and currently hits the
global method cache in MRI.
---
ext/kgio/extconf.rb | 1 +
ext/kgio/poll.c | 14 +++++++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/ext/kgio/extconf.rb b/ext/kgio/extconf.rb
index 44888dd..5b0b74a 100644
--- a/ext/kgio/extconf.rb
+++ b/ext/kgio/extconf.rb
@@ -51,6 +51,7 @@
have_func('rb_thread_blocking_region')
have_func('rb_thread_io_blocking_region')
have_func('rb_str_set_len')
+have_func("rb_hash_clear", "ruby.h") # Ruby 2.0+
have_func('rb_time_interval')
have_func('rb_wait_for_single_fd')
have_func('rb_str_subseq')
diff --git a/ext/kgio/poll.c b/ext/kgio/poll.c
index 1f931e7..1d8ebd1 100644
--- a/ext/kgio/poll.c
+++ b/ext/kgio/poll.c
@@ -12,8 +12,18 @@
#endif
static VALUE sym_wait_readable, sym_wait_writable;
+
+#ifdef HAVE_RB_HASH_CLEAR /* Ruby >= 2.0 */
+# define my_hash_clear(h) (void)rb_hash_clear(h)
+#else /* !HAVE_RB_HASH_CLEAR - Ruby <= 1.9.3 */
static ID id_clear;
+static void my_hash_clear(VALUE h)
+{
+ rb_funcall(h, id_clear, 0);
+}
+#endif /* HAVE_RB_HASH_CLEAR */
+
struct poll_args {
struct pollfd *fds;
nfds_t nfds;
@@ -126,7 +136,7 @@ static VALUE poll_result(int nr, struct poll_args *a)
int rc;
if ((nfds_t)nr != a->nfds)
- rb_funcall(a->ios, id_clear, 0);
+ my_hash_clear(a->ios);
for (; nr > 0; fds++) {
if (fds->revents == 0)
continue;
@@ -218,7 +228,9 @@ void init_kgio_poll(void)
sym_wait_readable = ID2SYM(rb_intern("wait_readable"));
sym_wait_writable = ID2SYM(rb_intern("wait_writable"));
+#ifndef HAVE_RB_HASH_CLEAR
id_clear = rb_intern("clear");
+#endif
#define c(x) rb_define_const(mKgio,#x,INT2NUM((int)x))
--
EW
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2015-08-11 19:58 [PATCH] poll: avoid rb_funcall for rb_hash_clear Eric Wong
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