Wireshark-bugs: [Wireshark-bugs] [Bug 3767] New: Precompile custom columns filters

Date: Wed, 22 Jul 2009 07:41:32 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3767

           Summary: Precompile custom columns filters
           Product: Wireshark
           Version: SVN
          Platform: Other
        OS/Version: Windows XP
            Status: NEW
          Severity: Enhancement
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: kovarththanan.rajaratnam@xxxxxxxxx



Kovarththanan Rajaratnam <kovarththanan.rajaratnam@xxxxxxxxx> changed:

           What    |Removed                     |Added
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   Attachment #3383|                            |review_for_checkin?
               Flag|                            |


Created an attachment (id=3383)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3383)
Precompile custom columns filters

Build Information:
Version 1.3.0

Copyright 1998-2009 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled with GTK+ 2.16.2, with GLib 2.20.3, with WinPcap (version unknown),
with libz 1.2.3, without POSIX capabilities, with libpcre 7.0, with SMI 0.4.8,
with c-ares 1.6.0, with Lua 5.1, without Python, with GnuTLS 2.8.1, with Gcrypt
1.4.4, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built Jul  2
2009), with AirPcap.

Running on Windows XP Service Pack 2, build 2600, with WinPcap version 4.1
beta5
(packet.dll version 4.1.0.1452), based on libpcap version 1.0.0, GnuTLS 2.8.1,
Gcrypt 1.4.4, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 30729

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.

--
We compile each custom column filter each time we process a new frame. This
amounts to a lot of overhead if the user has many custom columns. This patch
precompiles the custom column filters.

Benchmarks with a 100 MB file + 3 custom columns:

Before: 17 sec.
After : 13 sec.


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