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@jboner
jboner / latency.txt
Last active July 23, 2024 06:53
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
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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
@smileart
smileart / README.md
Last active March 16, 2024 15:42 — forked from agnoster/README.md
My ZSH Theme — Agnoster Mod

My modified fork of agnoster.zsh-theme

A ZSH theme optimized for people who use:

  • Solarized
  • Git
  • Unicode-compatible fonts and terminals (I use iTerm2 + Menlo)

Compatibility

@jpouellet
jpouellet / zbell.sh
Last active November 24, 2023 10:49
Makes Zsh print a bell when long-running commands finish. I use this in combination with i3 and throw big compile jobs (or whatever it may be) into another workspace to get a nice visual notification (workspace indicator turns red) when it's done so I don't need to waste time regularly checking on it.
#!/usr/bin/env zsh
# This script prints a bell character when a command finishes
# if it has been running for longer than $zbell_duration seconds.
# If there are programs that you know run long that you don't
# want to bell after, then add them to $zbell_ignore.
#
# This script uses only zsh builtins so its fast, there's no needless
# forking, and its only dependency is zsh and its standard modules
#