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@jboner
jboner / latency.txt
Last active May 15, 2026 13:13
Latency Numbers Every Programmer Should Know
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

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@Alquimista
Alquimista / bezdraw.py
Created October 9, 2011 20:45 — forked from jl2/bezdraw.py
Draw Bezier curves using Python and PyQt
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import math
from PyQt4 import QtGui, QtCore
def binomial(i, n):
@Schnouki
Schnouki / movmd.py
Created January 12, 2011 00:57
A small metadata parser for MP4 containers, designed to edit dates saved by digital cameras on .mov videos.
#!/usr/bin/env python3
# -*- mode: python -*-
# This program is free software. It comes without any warranty, to the extent
# permitted by applicable law. You can redistribute it and/or modify it under
# the terms of the Do What The Fuck You Want To Public License, Version 2, as
# published by Sam Hocevar. See http://sam.zoy.org/wtfpl/COPYING for more
# details.
# Some useful resources: