Frodox

Latency numbers every programmer should know

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  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

Frodox

Each existing unread and subsequent new emails after the script is started are 
passed as Mail objects to "process_email" function.Function header is provided
but processing implementation is left to the user. Error logs are currently sent
to a rotating log file (in the same directory as the script) and to STDOUT. 
Instead of polling or checking the server for new emails every now and then,
IMAP IDLE check is utilized.  Ensure that the IMAP server supports IDLE command
and allows at least 5 minutes of idling*** and uses the default ports for this 
script to work. Tested to work with Gmail and default installations of MS 
Exchange Server.

Frodox

from buildbot.plugins import worker

WILY_WORKER_NAMES = ['wily-worker-{}'.format(i) for i in range(3)]
XENIAL_WORKER_NAMES = ['xenial-worker-{}'.format(i) for i in range(3)]
YAKKETY_WORKER_NAMES = ['yakkety-worker-{}'.format(i) for i in range(3)]

WORKERS = [
    worker.DockerLatentWorker(
        worker_name,
        'SECRET',

Frodox

# Geany's snippets configuration file
#
# use \n or %newline% for a new line (it will be replaced by the used EOL char(s) - LF, CR/LF, CR).
# use \t or %ws% for an indentation step, it will be replaced according to the current document's indent mode.
# use \s to force whitespace at beginning or end of a value ('key= value' won't work, use 'key=\svalue').
# use %key% for all keys defined in the [Special] section.
# use %cursor% to define where the cursor should be placed after completion. You can define multiple
#     %cursor% wildcards and use the "Move cursor in snippet" to jump to the next defined cursor
#     position in the completed snippet.
# You can define a section for each supported filetype to overwrite default settings, the section

Frodox

#!/usr/bin/env python

#http://faq.pygtk.org/index.py?req=show&file=faq23.039.htp


try :
	import gtk.gdk
except ImportError :
	print 'You need to install pygtk'
	exit(1)

Frodox

#!/bin/sh

#
# For each ref, validate the commit.
#
# - It disallows deleting branches without a /.
# - It disallows non fast-forward on branches without a /.
# - It disallows deleting tags without a /.
# - It disallows unannotated tags to be pushed.

Frodox

The Unix time command

man time is a good start - on Linux you get the GNU time version.

Note: some shells (e.g.,bash(1)) have a built-in time command that provides less functionality than the command described here. To access the real command, you may need to specify its pathname (something like /usr/bin/time).

GNU time

A call of /usr/bin/time gives a lot of information:

/usr/bin/time ls > /dev/null

Frodox

for f in "$@"
do
	TMP=$(mktemp)
	SIZE_OLD=$(wc -c < "$f")
	echo "Optimizing '$f' of size $SIZE_OLD"
	/usr/bin/gs \
	-sDEVICE=pdfwrite \
	-dCompatibilityLevel=1.4 \
	-dPDFSETTINGS=/ebook \
	-dNOPAUSE \

Frodox

#!/bin/bash
convert $1 -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 $2

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

#!/bin/bash
convert in.jpg \( +clone -blur 0x20 \) -compose Divide_Src -composite -normalize -level 10%,90% -deskew 40% -unsharp 0x5+2+0 out.jpg

Frodox

Description

This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.

The script is here:

#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"

Results