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@mrnugget
mrnugget / go-sqlite3_database_is_locked.go
Created March 3, 2016 05:58
Program that tests the concurrency issues with go-sqlite3. This will create two tables: `products` and `users`. One goroutine will repeatedly read from the `products` table in N fresh goroutines. At the same time ONE goroutine writes to the other table.
package main
import (
"database/sql"
"fmt"
"log"
"math/rand"
"sync"
"time"
@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
@kylejfrost
kylejfrost / HOWTO.md
Last active June 23, 2026 22:58
How-To: Tweet All Commit Messages

Creating the post-commit file

Note: If you want to use your personal Twitter account to post commits, go to Step 2

  1. Create a new Twitter account for your commit messages. Example
  2. Go to http://dev.twitter.com and Sign In with your Twitter account you are posting commit messages to.
  3. Hover over your username in the top-right corner after signing in and select "My Applications"
  4. Create a new application
  5. The name, description, and site can all be whatever you want, but leave Callback URL empty
  6. Under "Application Settings" click "modify app permissions" next to "Access level"
@jboner
jboner / latency.txt
Last active July 22, 2026 01:06
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