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@jboner
jboner / latency.txt
Last active November 17, 2024 11:32
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
@fperez
fperez / ProgrammaticNotebook.ipynb
Last active November 14, 2024 11:22
Creating an IPython Notebook programatically
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@mculp
mculp / voices.txt
Created December 3, 2014 00:14
List of voices available by the `say` command on OS X
Agnes en_US # Isn't it nice to have a computer that will talk to you?
Albert en_US # I have a frog in my throat. No, I mean a real frog!
Alex en_US # Most people recognize me by my voice.
Alice it_IT # Salve, mi chiamo Alice e sono una voce italiana.
Alva sv_SE # Hej, jag heter Alva. Jag är en svensk röst.
Amelie fr_CA # Bonjour, je m’appelle Amelie. Je suis une voix canadienne.
Anna de_DE # Hallo, ich heiße Anna und ich bin eine deutsche Stimme.
Bad News en_US # The light you see at the end of the tunnel is the headlamp of a fast approaching train.
Bahh en_US # Do not pull the wool over my eyes.
Bells en_US # Time flies when you are having fun.
@jackdoerner
jackdoerner / bilateral_approximation.py
Last active November 12, 2022 23:05
Fast Bilateral Filter Approximation Using a Signal Processing Approach in Python
"""
bilateral_approximation.py
Fast Bilateral Filter Approximation Using a Signal Processing Approach in Python
Copyright (c) 2014 Jack Doerner
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
@pbugnion
pbugnion / ipython_notebook_in_git.md
Last active October 22, 2023 12:25
Keeping IPython notebooks under Git version control

This gist lets you keep IPython notebooks in git repositories. It tells git to ignore prompt numbers and program outputs when checking that a file has changed.

To use the script, follow the instructions given in the script's docstring.

For further details, read this blogpost.

The procedure outlined here is inspired by this answer on Stack Overflow.

@emily-pesce
emily-pesce / NestScript.gs
Last active June 26, 2023 07:12
Nest Thermostat Data Collection in Google Sheets for Upstairs/Downstairs Setups
// CREDIT TO BEEZLY for a lot of this, I just adapted it a bit and added more documentation :)
// --> BEEZLY's work: https://gist.github.com/beezly/9b2de3749d687fdbff3f
// To make this work:
// 1) create a new Google Sheet (name it whatever you'd like, e.g., "Nest Data")
// 2) on the menu bar click Tools -> Script Editor... to open Script Editor (new window)
// 3) in Script Editor delete all the default scripts/files, and create a new one (I called it "NestScript.gs")
// 4) cut and paste this entire file into NestScript.gs, then SAVE THE SCRIPT
// 5) on the menu bar click Publish -> Deploy as Web App
// select "Execute the App as Me"
@Arie
Arie / gist:25b260cc02d04a67d282
Last active October 22, 2020 21:37
Installing flent on OS/X with homebrew
`pip install flent matplotlib`
`brew install fping`
Netperf in homebrew is installed without demo mode by default, so we need to edit the recipe slightly, also demo mode fails to build under OS/X, requiring a tiny patch to netlib.c ( http://www.netperf.org/pipermail/netperf-talk/2013-December/001162.html ). The following recipe changes the URL to a prepatched version that I host and changes the configure line to enable demo mode.
`brew edit netperf`
```
class Netperf < Formula
desc "Benchmarks performance of many different types of networking"
<a href="javascript:void(d=document);void(el=d.getElementsByTagName('link'));void(g=false);for(i=0;i<el.length;i++){if(el[i].getAttribute('rel').indexOf('alternate')!=-1){ty=el[i].getAttribute('type');if(ty.indexOf('application/rss+xml')!=-1||ty.indexOf('text/xml')!=-1||ty.indexOf('application/atom+xml')!=-1){g=true;h=el[i].getAttribute('href');a=document.createElement('a');a.href=h;void(location.href='https://feedbin.com?subscribe='+a.href);}}};if(!g){window.alert('No Feed Found');};">Subscribe In Feedbin</a>
@sgillies
sgillies / latency.txt
Created October 19, 2016 11:54 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers
--------------------------
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
@sgillies
sgillies / advanced_rasterio_features.ipynb
Last active October 19, 2024 17:20
Advanced Rasterio features notebook
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