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From: Eric Wong <e@80x24.org>
To: rainbows-public@bogomips.org
Subject: [PATCH 1/5] tiny bytecode reductions for cold paths
Date: Sat, 21 Nov 2015 08:52:28 +0000
Message-ID: <20151121085232.23086-2-e@80x24.org> (raw)
In-Reply-To: <20151121085232.23086-1-e@80x24.org>

Less code in cold paths can improve speed for hot paths.

Single-byte strings for String#split is optimized in mainline Ruby,
so it's not actually a performance loss for sendfile_range in
response.rb

Regexps are at least 400 bytes each, so prefer non-Regexps
if possible, especially for cold sites where performance does
not matter.
---
 lib/rainbows/http_server.rb           | 4 ++--
 lib/rainbows/response.rb              | 4 ++--
 lib/rainbows/stream_response_epoll.rb | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/rainbows/http_server.rb b/lib/rainbows/http_server.rb
index 429539c..33bb96c 100644
--- a/lib/rainbows/http_server.rb
+++ b/lib/rainbows/http_server.rb
@@ -82,10 +82,10 @@ def svc
   end
 
   def use=(mod)
-    @use = mod.to_s.split(/::/)[-1].to_sym
+    @use = mod.to_s.split('::')[-1].to_sym
     new_defaults = {
       'rainbows.model' => @use,
-      'rack.multithread' => !!(mod.to_s =~ /Thread/),
+      'rack.multithread' => mod.to_s.include?('Thread'),
       'rainbows.autochunk' => [:Coolio,:Rev,:Epoll,:XEpoll,
                                :EventMachine,:NeverBlock].include?(@use),
     }
diff --git a/lib/rainbows/response.rb b/lib/rainbows/response.rb
index 0b5e542..9bbea81 100644
--- a/lib/rainbows/response.rb
+++ b/lib/rainbows/response.rb
@@ -40,7 +40,7 @@ def write_headers(status, headers, alive, body)
       else
         if /\n/ =~ value
           # avoiding blank, key-only cookies with /\n+/
-          buf << value.split(/\n+/).map! { |v| "#{key}: #{v}\r\n" }.join
+          value.split(/\n+/).each { |v| buf << "#{key}: #{v}\r\n" }
         else
           buf << "#{key}: #{value}\r\n"
         end
@@ -151,7 +151,7 @@ def sendfile_range(status, headers)
       200 == status &&
       /\Abytes=(\d+-\d*|\d*-\d+)\z/ =~ @hp.env['HTTP_RANGE'] or
         return
-      a, b = $1.split(/-/)
+      a, b = $1.split('-'.freeze)
 
       # HeaderHash is quite expensive, and Rack::File currently
       # uses a regular Ruby Hash with properly-cased headers the
diff --git a/lib/rainbows/stream_response_epoll.rb b/lib/rainbows/stream_response_epoll.rb
index 7c2f4f6..48ef298 100644
--- a/lib/rainbows/stream_response_epoll.rb
+++ b/lib/rainbows/stream_response_epoll.rb
@@ -39,7 +39,7 @@ def http_response_write(socket, status, headers, body)
         else
           if /\n/ =~ value
             # avoiding blank, key-only cookies with /\n+/
-            buf << value.split(/\n+/).map! { |v| "#{key}: #{v}\r\n" }.join
+            value.split(/\n+/).each { |v| buf << "#{key}: #{v}\r\n" }
           else
             buf << "#{key}: #{value}\r\n"
           end
-- 
EW


  reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-21  8:52 [PATCH 0/5] a few more odds and ends before 5.0 Eric Wong
2015-11-21  8:52 ` Eric Wong [this message]
2015-11-21  8:52 ` [PATCH 2/5] Ruby 1.9.3+-only cleanups Eric Wong
2015-11-21  8:52 ` [PATCH 3/5] response: avoid garbage string entirely Eric Wong
2015-11-21  8:52 ` [PATCH 4/5] revactor: remove fcntl dependency Eric Wong
2015-11-21  8:52 ` [PATCH 5/5] response: simplify regexp Eric Wong

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