| - L1 cache reference 0.5 ns | |
| - Branch mispredict 5 ns | |
| - L2 cache reference 7 ns | |
| - Mutex lock/unlock 25 ns | |
| - Main memory reference 100 ns | |
| - Compress 1K bytes with Zippy 3,000 ns | |
| - Send 2K bytes over 1 Gbps network 20,000 ns | |
| - Read 1 MB sequentially from memory 250,000 ns | |
| - Round trip within same datacenter 500,000 ns | |
| - Disk seek 10,000,000 ns |
(from http://www.metabrew.com/article/a-million-user-comet-application-with-mochiweb-part-1)
Save yourself some time and tune the kernel tcp settings before testing with lots of connections, or your test will fail and you’ll see lots of Out of socket memory messages (and if you are masquerading, nf_conntrack: table full, dropping packet.)
Here are the sysctl settings I ended up with - YMMV, but these will probably do:
$ cat /etc/sysctl.conf
# General gigabit tuning:
net.core.rmem_max = 16777216
| env |
| SRC=src | |
| $(JSHINT): | |
| npm install jshint | |
| JS_FILES=$(shell find $(SRC) -type f -name '*.js') | |
| jslint: $(JSHINT) | |
| -$(JSHINT) --jslint-reporter --config config/jshint.json > jshint.xml $(JS_FILES) || : | |
| sed -E 's?<file name="(.*)\?">?<file name="'`pwd`'/\1">?' jshint.xml > jshint-proper.xml |
| import sys | |
| import codecs | |
| import pystache | |
| import os | |
| import fnmatch | |
| import string | |
| import datetime | |
| webroot = 'http://www.example.com/ | |
| path = '/var/www/' |
| #!/usr/bin/env bash | |
| for i in 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23; do echo $( echo -e "$i\t"; git shortlog -n --format='%ad %s' | grep " $i:" | wc -l); done |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>CSS3 Sign</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
| <link rel="stylesheet" href="style.css" /> | |
| </head> | |
| <body> | |
| <div class="container"> |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>D3 over Polymap example</title> | |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> | |
| <link rel="stylesheet" href="map.css" /> | |
| </head> | |
| <body onload="init();"> | |
| <div id="map_container"></div> |