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@jboner
jboner / latency.txt
Last active November 16, 2024 21:28
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
@shiroyuki
shiroyuki / setup.sh
Created February 8, 2016 05:55
Install & fixing Numpy for Alpine Linux (Python 3.5+)
pip install cython
apk add musl-dev
#apk add linux-headers
@veelo
veelo / howto.md
Last active September 27, 2018 01:03
ddox on Travis CI

Serve ddox documentation on github.io deployed by Travis CI

This guide makes no assumptions on prior knowledge of Github Pages or Travis CI. You'll know which steps to skip (if the project uses Pages already, this will overwrite them). Assumed is you have a public D project on GitHub and you have documented its API with embedded ddoc comments. You should probably be aware of the known issues of ddox, which we use here.

For a project URL like https://github.com/<user>/<project>, the documentation will appear at https://<user>.github.io/<project>/.

Enable Travis CI for your repository

The long story: https://docs.travis-ci.com/user/getting-started/, https://docs.travis-ci.com/user/languages/d/

The short story:

@kthompson
kthompson / print_hex.asm
Last active August 15, 2022 15:52 — forked from jsutlovic/print_hex.asm
Assembly print hex
[org 0x7c00]
mov dx, 0x1fb7 ; Set the value we want to print to dx
call print_hex ; Print the hex value
jmp $ ; Hang once we're done
%include "print_string.asm"
; Prints the value of DX as hex.
print_hex: