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kaidul
/ README.md
Created
April 5, 2018 11:53
— forked from hofmannsven/README.md
My simply MySQL Command Line Cheatsheet
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| package com.ipvision.nutch.hbase.webtable; | |
| import java.io.IOException; | |
| import java.lang.invoke.MethodHandles; | |
| import java.util.ArrayList; | |
| import java.util.List; | |
| import java.util.Map; | |
| import java.util.Map.Entry; | |
| import org.apache.hadoop.conf.Configuration; |
kaidul
/ latency.txt
Created
October 6, 2016 19:58
— forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
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| Latency Comparison Numbers | |
| -------------------------- | |
| 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 |