Raffael Bottoli Schemmer RaffaelSchemmer

🎯

Focusing

Computer Science Teacher, Full Stack Developer at Ottomatics and Infrastructure Constructor (Hw/Sw and Network) Student at Rocketseat

RaffaelSchemmer / MatrixMultiplication.cpp

Created May 13, 2018 20:19 — forked from isabek/MatrixMultiplication.cpp

Matrix multiplication strategies: ijk, ikj, jik, jki, kij, kji

	#include <vector>
	#include <cstdio>
	#include <algorithm>
	#include <ctime>

	class Log {
	public:
	static void print(const char* strategy, long long int start, long long int end){
	printf("%s: %f seconds\n", strategy, (double)(end - start) / 1000000);
	}

isabek / MatrixMultiplication.cpp

Last active October 19, 2023 08:55

Matrix multiplication strategies: ijk, ikj, jik, jki, kij, kji

	#include <vector>
	#include <cstdio>
	#include <algorithm>
	#include <ctime>

	class Log {
	public:
	static void print(const char* strategy, long long int start, long long int end){
	printf("%s: %f seconds\n", strategy, (double)(end - start) / 1000000);
	}

jboner / latency.txt

Last active March 16, 2026 22:58

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