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Latency Comparison Numbers (~2012) | |
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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 |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<script type="text/javascript" src="loggingLetters.js"></script> | |
</head> | |
<body bgcolor="lavender"> | |
</body> | |
</html> |
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<html> | |
<body align=center bgcolor="lightblue"> | |
<p> </p> <p> </p><br> </br><br> </br> | |
<button class="start">start</button> | |
| |
<button class="clear">clear</button></body> | |
</html> | |