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@jboner
jboner / latency.txt
Last active June 12, 2026 23:11
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
@asukakenji
asukakenji / 0-go-os-arch.md
Last active June 5, 2026 16:29
Go (Golang) GOOS and GOARCH

Go (Golang) GOOS and GOARCH

All of the following information is based on go version go1.17.1 darwin/amd64.

GOOS Values

GOOS Out of the Box
aix
android
@j8
j8 / disable all macos animations
Last active June 3, 2026 15:49
disable all macos animations for high performance
defaults write -g NSScrollViewRubberbanding -int 0
defaults write -g NSAutomaticWindowAnimationsEnabled -bool false
defaults write -g NSScrollAnimationEnabled -bool false
defaults write -g NSWindowResizeTime -float 0.001
defaults write -g QLPanelAnimationDuration -float 0
defaults write -g NSScrollViewRubberbanding -bool false
defaults write -g NSDocumentRevisionsWindowTransformAnimation -bool false
defaults write -g NSToolbarFullScreenAnimationDuration -float 0
defaults write -g NSBrowserColumnAnimationSpeedMultiplier -float 0
defaults write com.apple.dock autohide-time-modifier -float 0
@lamperez
lamperez / cs35l41_spi.md
Last active April 9, 2026 05:27
CS35L41 amplifiers in an ASUS Zenbook on linux

Asus Zenbook UX3402 speakers on Linux

Important

THIS IS NOW OBSOLETE WITH KERNEL VERSIONS ≥ 6.7.0

A recent announcement in the kernel mail list by Cirrus developers will solve the problem described here. Therefore, the proposed solutions will be soon obsolete. See this comment (thanks, @flukejones, for the tip).

I got the speakers working on my Asus Zenbook 14 OLED UX3402, the one with Intel CPU and the two CS35L41 audio amplifiers connected over SPI (not the UM3402YA, with AMD and I²C). The amplifiers are supported by the snd_hda_scodec_cs35l41 module in recent kernel versions, but they require some model-specific configuration paramaters, that should be provided by

@mrispoli24
mrispoli24 / setting-up-heroku-and-cloudflare.md
Created October 15, 2018 18:41
Setting up Heroku and Cloudflare (the right way)

Setting up Heroku and Cloudflare (the right way)

The following outlines how to setup Heroku + Cloudflare with a full SSL certificate. What this means is that communication between the browser and the Cloudflare CDN is encrypted as well as communication between Cloudflare and Heroku’s origin server. Follow these steps exactly and the setup is a breeze.

Step 1: Set up domain names in Heroku

First you want to add the root domain and the www domain to heroku. You do this by clicking into your production application, then going to settings and then scrolling down to Domains and certificates.

Here you will add <your_domain>.com and www.<your_domain>.com. This will give you two CNAME records. They will look something like <your_domain>.com.herokudns.com and www.<your_domain>.com.herokudns.com.

Step 2: Add CNAME records to Cloudfare.

@lupyuen
lupyuen / zig-termux.md
Last active February 28, 2026 17:34
Install Zig in Termux Android

Install Zig in Termux Android

Here are the steps to install Zig Compiler in Termux Android...

Install Termux from F-Droid, because the Google Play version is outdated...

Launch Termux on Android and enter...

@HananoshikaYomaru
HananoshikaYomaru / fix.css
Last active January 27, 2026 18:31
life calendar in obsidian using dataview js
/* wide */
.wide .markdown-preview-sizer {
max-width: unset !important;
}
.life-calendar p a.internal-link {
display: inline-block;
}
@avishayp
avishayp / Dockerfile
Created September 25, 2018 19:02
Add non-root user for alpine linux
# non root user example for alpine
#
# usage:
# $ docker build --build-arg "USER=someuser" --tag test .
# $ docker run --rm test
FROM alpine
ARG USER=default
ENV HOME /home/$USER
@actuallymentor
actuallymentor / commands.sh
Last active December 28, 2025 03:35
Android Shell Commands (for use with Tasker or adb)
##
# These commands can all be run as Tasker shell commands, or through adb
# NOTE ON ROOT: I noticed many commands work through the adb shell, but fail in tasker unless using ROOT. If you tasks fail, try enabling root for it
##
## SETTING THINGS
# Enable deep doze
dumpsys deviceidle force-idle
@rashid327
rashid327 / states-of-india
Last active June 19, 2025 08:33
Indian States dropdown HTML
<!-- States of India -->
<select>
<option value="AP">Andhra Pradesh</option>
<option value="AR">Arunachal Pradesh</option>
<option value="AS">Assam</option>
<option value="BR">Bihar</option>
<option value="CT">Chhattisgarh</option>
<option value="GA">Gujarat</option>
<option value="HR">Haryana</option>