hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

charles-l

# Converts an animated gif to a spritesheet using ImageMagick
file_name=$(echo $1 | sed 's/\(.*\)\..*/\1/')
montage $1 -tile x1 -geometry '1x1+0+0<' -alpha On -background "rgba(0, 0, 0, 0.0)" -quality 100 $file_name.png