kyleaolson

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

kyleaolson

# Install deps
sudo apt install build-essential cmake qt5-default libmpv-dev

# Clone Repo
git clone https://github.com/easymodo/qimgv.git

# Build
cd qimgv/scripts
./build.sh
rm: cannot remove 'build': No such file or directory