unicorn Ruby/Rack server user+dev discussion/patches/pulls/bugs/help
 help / color / mirror / code / Atom feed
From: Eric Wong <e@80x24.org>
To: Simon Eskildsen <simon.eskildsen@shopify.com>
Cc: unicorn-public@bogomips.org
Subject: [PATCH ccc-tcp-v3] http_request: reduce insn size for check_client_connection
Date: Tue, 14 Mar 2017 19:20:17 +0000	[thread overview]
Message-ID: <20170314192016.GA27213@whir> (raw)

Unlike constants and instance variables, class variable access
is not optimized in the mainline Ruby VM.  Use a constant
instead, to take advantage of inline constant caching.

This further reduces runtime instruction size by avoiding a
branch by allocating the Raindrops::TCP_Info object up front.

This reduces the method size by roughly 300 bytes on 64-bit.
  Also pushed to git://bogomips.org/unicorn ccc-tcp-v3

 lib/unicorn/http_request.rb | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/lib/unicorn/http_request.rb b/lib/unicorn/http_request.rb
index c08097c..9010007 100644
--- a/lib/unicorn/http_request.rb
+++ b/lib/unicorn/http_request.rb
@@ -106,12 +106,13 @@ def hijacked?
   if defined?(Raindrops::TCP_Info)
+    TCPI = Raindrops::TCP_Info.allocate
     def check_client_connection(socket) # :nodoc:
       if Unicorn::TCPClient === socket
-        @@tcp_info ||= Raindrops::TCP_Info.new(socket)
-        @@tcp_info.get!(socket)
+        # Raindrops::TCP_Info#get!, #state (reads struct tcp_info#tcpi_state)
         raise Errno::EPIPE, "client closed connection".freeze,
-              EMPTY_ARRAY if closed_state?(@@tcp_info.state)
+              EMPTY_ARRAY if closed_state?(TCPI.get!(socket).state)

                 reply	other threads:[~2017-03-14 19:20 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

  List information: https://yhbt.net/unicorn/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170314192016.GA27213@whir \
    --to=e@80x24.org \
    --cc=simon.eskildsen@shopify.com \
    --cc=unicorn-public@bogomips.org \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
Code repositories for project(s) associated with this public inbox


This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).