rnyrnyrny

// NOTE
// This gist was created long time ago.
// According to zap's doc, now we can use zapcore.AddSync to directly add lumberjack as a zap sync
// see https://github.com/uber-go/zap/blob/master/FAQ.md#does-zap-support-log-rotation
// So I wrote a new gist if anyone is interested:
// https://gist.github.com/rnyrnyrny/a6dc926ae11951b753ecd66c00695397

// 下面的代码已经过时了，现在直接用zapcore.AddSync就行，参考zap文档

// thanks to:

jboner

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