Skip to content

Instantly share code, notes, and snippets.

View hodlbirb's full-sized avatar

Dmitry hodlbirb

  • Hong Kong
View GitHub Profile
@jboner
jboner / latency.txt
Last active July 28, 2024 12:12
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
@shreyasbharath
shreyasbharath / hexdump.cpp
Last active June 16, 2023 19:30
Hexdump - C++ version of XXD style hexdump (based on this StackOverflow answer https://stackoverflow.com/a/7776146/801008)
#include <iomanip>
#include <iostream>
#include <vector>
#include <termcolor.hpp>
void HexDump(const std::vector<uint8_t>& bytes, std::ostream& stream)
{
char buff[17];
size_t i = 0;