https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5802
--- Comment #15 from Jakub Zawadzki <darkjames@xxxxxxxxxxxxxxxx> 2011-04-06 10:54:48 PDT ---
Created an attachment (id=6128)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=6128)
Program to benchmark wiretap i/o
Some benchmarks (programm attached, enjoy :>):
#1 - read packets from start to end
#2 - read packets from end to start (read 15 packets sequential)
#3 - random seek
$ stat /tmp/pcap
File: `/tmp/pcap'
Size: 81546244 Blocks: 159272 IO Block: 4096 regular file
(78 MiB)
$ ./capinfos /tmp/pcap
File name: /tmp/pcap
File type: Wireshark/tcpdump/... - libpcap
File encapsulation: IEEE 802.11 plus radiotap WLAN header
Number of packets: 60174
File size: 81546244 bytes
Data size: 80583436 bytes
Data byte rate: 54575.10 bytes/sec
Data bit rate: 436600.77 bits/sec
Average packet size: 1339.17 bytes
Average packet rate: 40.75 packets/sec
Test results:
fread:
Test1: 61 ms (packets 60174 data offset: 81546072)
Test2: 93 ms
Test3: 18 ms
fread_unlocked:
Test1: 60 ms (packets 60174 data offset: 81546072)
Test2: 92 ms
Test3: 18 ms
zlib i/o:
Test1: 52 ms (packets 60174 data offset: 81546072)
Test2: 352 ms
Test3: 45 ms
new (GZBUFSIZE 8192)
Test1: 51 ms (packets 60174 data offset: 81546072)
Test2: 357 ms
Test3: 46 ms
new (GZBUFSIZE 4096)
Test1: 52 ms (packets 60174 data offset: 81546072)
Test2: 214 ms
Test3: 27 ms
new (GZBUFSIZE 2048)
Test1: 57 ms (packets 60174 data offset: 81546072)
Test2: 159 ms
Test3: 17 ms
FILE i/o wins ;)
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