This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
crypto = require('crypto'); | |
#Quick MD5 of text | |
text = "MD5 this text!" | |
md5hash1 = crypto.createHash('md5').update(text).digest("hex") | |
#MD5 of text with updates | |
m = crypto.createHash('md5') | |
m.update("MD5 ") | |
m.update("this ") |
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
-- show running queries (pre 9.2) | |
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query | |
FROM pg_stat_activity | |
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
ORDER BY query_start desc; | |
-- show running queries (9.2) | |
SELECT pid, age(clock_timestamp(), query_start), usename, query | |
FROM pg_stat_activity | |
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
// the smiley program demonstrated by Russ Cox at http://research.swtch.com/acme | |
// it shows that the plan9 compiler http://plan9.bell-labs.com/sys/doc/comp.html fully supports UTF-8 | |
// i tried to compile it with a recent version of the plan9 compiler running on vmware but it failed. | |
// it seems that older versions of the compiler supported sizeof(void) == 0 | |
// anyway you get the idea | |
#include <u.h> | |
#include <libc.h> |
/* | |
* http://goo.gl/AKBve | |
*/ | |
// create a new profile at the bottom of the connect dialog, call it windows and then paste this: | |
term_.prefs_.set('font-family', 'Lucida Console'); | |
term_.prefs_.set('font-size', 12); | |
// this is the standard settings for a profile | |
term_.prefs_.set('font-family', 'monospace'); // standard | |
term_.prefs_.set('font-size', 15); // standard |
Work in progress, I'll write this up properly when I'm done.
Almost all credit goes to @maxogden for putting me on to this and pointing me in the right direction for each of these items.
Prerequisites:
// create file: | |
sudo vim /usr/share/applications/intellij.desktop | |
// add the following | |
[Desktop Entry] | |
Version=13.0 | |
Type=Application | |
Terminal=false | |
Icon[en_US]=/home/rob/.intellij-13/bin/idea.png | |
Name[en_US]=IntelliJ |
/* Useful celery config. | |
app = Celery('tasks', | |
broker='redis://localhost:6379', | |
backend='redis://localhost:6379') | |
app.conf.update( | |
CELERY_TASK_RESULT_EXPIRES=3600, | |
CELERY_QUEUES=( | |
Queue('default', routing_key='tasks.#'), |