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From: Eric Wong <e@80x24.org>
To: meta@public-inbox.org
Subject: [PATCH 25/57] http|nntp: favor "$! == EFOO" over $!{EFOO} checks
Date: Mon, 24 Jun 2019 02:52:26 +0000
Message-ID: <20190624025258.25592-26-e@80x24.org> (raw)
In-Reply-To: <20190624025258.25592-1-e@80x24.org>

Integer comparisions of "$!" are faster than hash lookups.

See commit 6fa2b29fcd0477d126ebb7db7f97b334f74bbcbc
("ds: cleanup Errno imports and favor constant comparisons")
for benchmarks.
---
 lib/PublicInbox/HTTP.pm        | 7 +++----
 lib/PublicInbox/HTTPD/Async.pm | 3 ++-
 lib/PublicInbox/NNTP.pm        | 4 ++--
 lib/PublicInbox/Qspawn.pm      | 7 +++++--
 4 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/lib/PublicInbox/HTTP.pm b/lib/PublicInbox/HTTP.pm
index 773d77ba..4738e156 100644
--- a/lib/PublicInbox/HTTP.pm
+++ b/lib/PublicInbox/HTTP.pm
@@ -27,6 +27,7 @@ use constant {
 	CHUNK_ZEND => -3,    # \r\n
 	CHUNK_MAX_HDR => 256,
 };
+use Errno qw(EAGAIN);
 
 my $pipelineq = [];
 my $pipet;
@@ -82,11 +83,9 @@ sub event_step { # called by PublicInbox::DS
 		return rbuf_process($self);
 	}
 
-	return $self->watch_in1 if $!{EAGAIN};
-
 	# common for clients to break connections without warning,
 	# would be too noisy to log here:
-	return $self->close;
+	$! == EAGAIN ? $self->watch_in1 : $self->close;
 }
 
 sub rbuf_process {
@@ -359,7 +358,7 @@ sub write_err {
 sub recv_err {
 	my ($self, $r, $len) = @_;
 	return $self->close if (defined $r && $r == 0);
-	if ($!{EAGAIN}) {
+	if ($! == EAGAIN) {
 		$self->{input_left} = $len;
 		return $self->watch_in1;
 	}
diff --git a/lib/PublicInbox/HTTPD/Async.pm b/lib/PublicInbox/HTTPD/Async.pm
index 3eb7f75a..9cc41f17 100644
--- a/lib/PublicInbox/HTTPD/Async.pm
+++ b/lib/PublicInbox/HTTPD/Async.pm
@@ -11,6 +11,7 @@ use warnings;
 use base qw(PublicInbox::DS);
 use fields qw(cb cleanup);
 require PublicInbox::EvCleanup;
+use Errno qw(EAGAIN);
 
 sub new {
 	my ($class, $io, $cb, $cleanup) = @_;
@@ -57,7 +58,7 @@ sub main_cb ($$$) {
 			}
 			# fall through to close below...
 		} elsif (!defined $r) {
-			return restart_read($self) if $!{EAGAIN};
+			return restart_read($self) if $! == EAGAIN;
 		}
 
 		# Done! Error handling will happen in $fh->close
diff --git a/lib/PublicInbox/NNTP.pm b/lib/PublicInbox/NNTP.pm
index 98f88410..fbdf1364 100644
--- a/lib/PublicInbox/NNTP.pm
+++ b/lib/PublicInbox/NNTP.pm
@@ -25,6 +25,7 @@ use constant {
 	r430 => '430 No article with that message-id',
 };
 use PublicInbox::Syscall qw(EPOLLIN EPOLLONESHOT);
+use Errno qw(EAGAIN);
 
 my @OVERVIEW = qw(Subject From Date Message-ID References Xref);
 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
@@ -946,8 +947,7 @@ sub event_step {
 		my $off = length($$rbuf);
 		$r = sysread($self->{sock}, $$rbuf, LINE_MAX, $off);
 		unless (defined $r) {
-			return $self->watch_in1 if $!{EAGAIN};
-			return $self->close;
+			return $! == EAGAIN ? $self->watch_in1 : $self->close;
 		}
 		return $self->close if $r == 0;
 	}
diff --git a/lib/PublicInbox/Qspawn.pm b/lib/PublicInbox/Qspawn.pm
index 943ee801..f2630a0f 100644
--- a/lib/PublicInbox/Qspawn.pm
+++ b/lib/PublicInbox/Qspawn.pm
@@ -29,6 +29,9 @@ use warnings;
 use PublicInbox::Spawn qw(popen_rd);
 require Plack::Util;
 
+# n.b.: we get EAGAIN with public-inbox-httpd, and EINTR on other PSGI servers
+use Errno qw(EAGAIN EINTR);
+
 my $def_limiter;
 
 # declares a command to spawn (but does not spawn it).
@@ -131,7 +134,7 @@ sub psgi_qx {
 		} elsif (defined $r) {
 			$r ? $qx->write($buf) : $end->();
 		} else {
-			return if $!{EAGAIN} || $!{EINTR}; # loop again
+			return if $! == EAGAIN || $! == EINTR; # loop again
 			$end->();
 		}
 	};
@@ -193,7 +196,7 @@ sub psgi_return {
 	my $buf = '';
 	my $rd_hdr = sub {
 		my $r = sysread($rpipe, $buf, 1024, length($buf));
-		return if !defined($r) && ($!{EINTR} || $!{EAGAIN});
+		return if !defined($r) && $! == EAGAIN || $! == EINTR;
 		$parse_hdr->($r, \$buf);
 	};
 
-- 
EW


  parent reply index

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-24  2:52 [PATCH 00/57] ds: shrink, TLS support, buffer writes to FS Eric Wong
2019-06-24  2:52 ` [PATCH 01/57] ds: get rid of {closed} field Eric Wong
2019-06-24  2:52 ` [PATCH 02/57] ds: get rid of more unused debug instance methods Eric Wong
2019-06-24  2:52 ` [PATCH 03/57] ds: use and export monotonic now() Eric Wong
2019-06-24  2:52 ` [PATCH 04/57] AddTimer: avoid clock_gettime for the '0' case Eric Wong
2019-06-24  2:52 ` [PATCH 05/57] ds: get rid of on_incomplete_write wrapper Eric Wong
2019-06-24  2:52 ` [PATCH 06/57] ds: lazy initialize wbuf_off Eric Wong
2019-06-24  2:52 ` [PATCH 07/57] ds: split out from ->flush_write and ->write Eric Wong
2019-06-24  2:52 ` [PATCH 08/57] ds: lazy-initialize wbuf Eric Wong
2019-06-24  2:52 ` [PATCH 09/57] ds: don't pass `events' arg to EPOLL_CTL_DEL Eric Wong
2019-06-24  2:52 ` [PATCH 10/57] ds: remove support for DS->write(undef) Eric Wong
2019-06-24  2:52 ` [PATCH 11/57] http: favor DS->write(strref) when reasonable Eric Wong
2019-06-24  2:52 ` [PATCH 12/57] ds: share send(..., MSG_MORE) logic Eric Wong
2019-06-24  2:52 ` [PATCH 13/57] ds: switch write buffering to use a tempfile Eric Wong
2019-06-24  2:52 ` [PATCH 14/57] ds: get rid of redundant and unnecessary POLL* constants Eric Wong
2019-06-24  2:52 ` [PATCH 15/57] syscall: get rid of unused EPOLL* constants Eric Wong
2019-06-24  2:52 ` [PATCH 16/57] syscall: get rid of unnecessary uname local vars Eric Wong
2019-06-24  2:52 ` [PATCH 17/57] ds: set event flags directly at initialization Eric Wong
2019-06-24  2:52 ` [PATCH 18/57] ds: import IO::KQueue namespace Eric Wong
2019-06-24  2:52 ` [PATCH 19/57] ds: share watch_chg between watch_read/watch_write Eric Wong
2019-06-24  2:52 ` [PATCH 20/57] ds: remove IO::Poll support (for now) Eric Wong
2019-06-24  2:52 ` [PATCH 21/57] ds: get rid of event_watch field Eric Wong
2019-06-24  2:52 ` [PATCH 22/57] httpd/async: remove EINTR check Eric Wong
2019-06-24  2:52 ` [PATCH 23/57] spawn: remove `Blocking' flag handling Eric Wong
2019-06-24  2:52 ` [PATCH 24/57] qspawn: describe where `$rpipe' come from Eric Wong
2019-06-24  2:52 ` Eric Wong [this message]
2019-06-24  2:52 ` [PATCH 26/57] ds: favor `delete' over assigning fields to `undef' Eric Wong
2019-06-24  2:52 ` [PATCH 27/57] http: don't pass extra args to PublicInbox::DS::close Eric Wong
2019-06-24  2:52 ` [PATCH 28/57] ds: pass $self to code references Eric Wong
2019-06-24  2:52 ` [PATCH 29/57] evcleanup: replace _run_asap with `event_step' callback Eric Wong
2019-06-24  2:52 ` [PATCH 30/57] ds: remove pointless exit calls Eric Wong
2019-06-24  2:52 ` [PATCH 31/57] http|nntp: be explicit about bytes::length on rbuf Eric Wong
2019-06-24  2:52 ` [PATCH 32/57] ds: hoist out do_read from NNTP and HTTP Eric Wong
2019-06-24  2:52 ` [PATCH 33/57] nntp: simplify re-arming/requeue logic Eric Wong
2019-06-24  2:52 ` [PATCH 34/57] allow use of PerlIO layers for filesystem writes Eric Wong
2019-06-24  2:52 ` [PATCH 35/57] ds: deal better with FS-related errors IO buffers Eric Wong
2019-06-24  2:52 ` [PATCH 36/57] nntp: wait for writability before sending greeting Eric Wong
2019-06-24  2:52 ` [PATCH 37/57] nntp: NNTPS and NNTP+STARTTLS working Eric Wong
2019-06-24  2:52 ` [PATCH 38/57] certs/create-certs.perl: fix cert validity on 32-bit Eric Wong
2019-06-24  2:52 ` [PATCH 39/57] daemon: map inherited sockets to well-known schemes Eric Wong
2019-06-24  2:52 ` [PATCH 40/57] ds|nntp: use CORE::close on socket Eric Wong
2019-06-24  2:52 ` [PATCH 41/57] nntp: call SSL_shutdown in normal cases Eric Wong
2019-06-24  2:52 ` [PATCH 42/57] t/nntpd-tls: slow client connection test Eric Wong
2019-06-24  2:52 ` [PATCH 43/57] daemon: use SSL_MODE_RELEASE_BUFFERS Eric Wong
2019-06-24  2:52 ` [PATCH 44/57] ds: allow ->write callbacks to syswrite directly Eric Wong
2019-06-24  2:52 ` [PATCH 45/57] nntp: reduce allocations for greeting Eric Wong
2019-06-24  2:52 ` [PATCH 46/57] ds: always use EV_ADD with EV_SET Eric Wong
2019-06-24  2:52 ` [PATCH 47/57] nntp: simplify long response logic and fix nesting Eric Wong
2019-06-24  2:52 ` [PATCH 48/57] ds: flush_write runs ->write callbacks even if closed Eric Wong
2019-06-24  2:52 ` [PATCH 49/57] nntp: lazily allocate and stash rbuf Eric Wong
2019-06-24  2:52 ` [PATCH 50/57] ci: require IO::KQueue on FreeBSD, for now Eric Wong
2019-06-24  2:52 ` [PATCH 51/57] nntp: send greeting immediately for plain sockets Eric Wong
2019-06-24  2:52 ` [PATCH 52/57] daemon: set TCP_DEFER_ACCEPT on everything but NNTP Eric Wong
2019-06-24  2:52 ` [PATCH 53/57] daemon: use FreeBSD accept filters on non-NNTP Eric Wong
2019-06-24  2:52 ` [PATCH 54/57] ds: split out IO::KQueue-specific code Eric Wong
2019-06-24  5:24   ` Eric Wong
2019-06-24  2:52 ` [PATCH 55/57] ds: reimplement IO::Poll support to look like epoll Eric Wong
2019-06-24  2:52 ` [PATCH 56/57] Revert "ci: require IO::KQueue on FreeBSD, for now" Eric Wong
2019-06-24  2:52 ` [PATCH 57/57] ds: reduce overhead of tempfile creation Eric Wong
2019-06-24  5:25 ` [PATCH 58/57] Makefile: skip DSKQXS in global syntax check Eric Wong
2019-06-24 18:28 ` [PATCH 59/57] ds: ->write must not clobber empty wbuf array Eric Wong

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