Optimization

Latency

• L1 cache reference 0.5 ns

• Branch mispredict 5 ns

• L2 cache reference 7 ns

• Mutex lock/unlock 100 ns

• Main memory reference 100 ns

• Compress 1K bytes with Zippy 10,000 ns

• Send 2K bytes over 1 Gbps network 20,000 ns

• Read 1 MB sequentially from memory 250,000 ns

• Round trip within same datacenter 500,000 ns

• Disk seek 10,000,000 ns

• Read 1 MB sequentially from network 10,000,000 ns

• Read 1 MB sequentially from disk 30,000,000 ns

• Send packet CA->Netherlands->CA 150,000,000 ns

Server

https://code.tubitv.com/how-we-discovered-a-7-year-old-performance-issue-in-elixir-99080bdce9a1