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@jboner
jboner / latency.txt
Last active May 17, 2025 02:27
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
@miromannino
miromannino / service.md
Last active February 24, 2025 22:04 — forked from naholyr/_service.md
Sample /etc/init.d script

Sample service script for debian/ubuntu

Look at LSB init scripts for more information.

Usage

Copy to /etc/init.d:

# replace "$YOUR_SERVICE_NAME" with your service's name
@joyrexus
joyrexus / README.md
Last active December 30, 2024 01:37
collapsible markdown

collapsible markdown?

CLICK ME

yes, even hidden code blocks!

print("hello world!")
@JoeyBurzynski
JoeyBurzynski / 55-bytes-of-css.md
Last active May 12, 2025 13:07
58 bytes of css to look great nearly everywhere

58 bytes of CSS to look great nearly everywhere

When making this website, i wanted a simple, reasonable way to make it look good on most displays. Not counting any minimization techniques, the following 58 bytes worked well for me:

main {
  max-width: 38rem;
  padding: 2rem;
  margin: auto;
}
@vandarin
vandarin / ColorTempRGBWLight.h
Last active July 9, 2024 11:35 — forked from triphoppingman/ColorTempRGBWLight.h
ESPHOME custom light that provides color temperature support to RGBW lights. This differs from the original (see link in the code) by mapping the RGBW from the
#include "esphome.h"
enum mode {RGB, White};
// Constants
const float maxMired = 500;
const float minMired = 153;
/**
* Map a RGBW Light into a tunable color / RGB Light