http11: ~6% performance increase in header parsing

Allocate one string object and avoid appending to it causing it
to be resized.  Additionally, optimize the string toupper copy
so that it's done in a single pass.

Also, use an inline, locale-independent toupper() implementation
which should be more predictable for users with exotic locales
(HTTP header names are always ASCII).

The following test script was used:
require 'mongrel'
include Mongrel

parser = HttpParser.new
req = "GET /ruby HTTP/1.1\r\n" \
      "User-Agent: curl/7.12.3\r\n" \
      "Host: bogomips.org\r\n" \
      "Accept: */*\r\n" \
      "\r\n".freeze
hash = Hash.new
100000.times do
  parser.execute(hash, req, 0)
  parser.reset
  hash.clear
end


git-svn-id: svn+ssh://rubyforge.org/var/svn/mongrel/trunk@989 19e92222-5c0b-0410-8929-a290d50e31e9

1 files changed, 2 insertions, 0 deletions

diff --git a/ext/http11/ext_help.h b/ext/http11/ext_help.h
index 8b4d754..1017c64 100644
--- a/ext/http11/ext_help.h
+++ b/ext/http11/ext_help.h
@@ -4,6 +4,8 @@
 #define RAISE_NOT_NULL(T) if(T == NULL) rb_raise(rb_eArgError, "NULL found for " # T " when shouldn't be.");
 #define DATA_GET(from,type,name) Data_Get_Struct(from,type,name); RAISE_NOT_NULL(name);
 #define REQUIRE_TYPE(V, T) if(TYPE(V) != T) rb_raise(rb_eTypeError, "Wrong argument type for " # V " required " # T);
+#define ASCII_UPCASE_CHAR(ch) (ch & ~0x20)
+
 
 #ifdef DEBUG
 #define TRACE()  fprintf(stderr, "> %s:%d:%s\n", __FILE__, __LINE__, __FUNCTION__)