Estimation on Pavan Yarahttps://pavanyara.com/tags/estimation/Recent content in Estimation on Pavan YaraHugo -- gohugo.ioen-USpavan.yara@gmail.com (Pavan Yara)pavan.yara@gmail.com (Pavan Yara)Pavan YaraMon, 11 Nov 2019 16:15:36 +0530Napkin Numbershttps://pavanyara.com/blog/napkin-numbers/Mon, 11 Nov 2019 16:15:36 +0530pavan.yara@gmail.com (Pavan Yara)https://pavanyara.com/blog/napkin-numbers/<p>L1 cache reference 0.5 ns</p> <p>Branch mispredict 5 ns</p> <p>L2 cache reference 7 ns</p> <p>Mutex lock/unlock 25 ns</p> <p>Main memory reference 100 ns</p> <p>Compress 1K bytes with Zippy 3,000 ns</p> <p>Send 2K bytes over 1 Gbps network 20,000 ns</p> <p>Read 1 MB sequentially from memory 250,000 ns</p> <p>Round trip within same datacenter 500,000 ns</p> <p>Disk seek 10,000,000 ns</p> <p>Read 1 MB sequentially from disk 20,000,000 ns</p> <p>Send packet CA-&gt;Netherlands-&gt;CA 150,000,000 ns</p>L1 cache reference 0.5 ns

Branch mispredict 5 ns

L2 cache reference 7 ns

Mutex lock/unlock 25 ns

Main memory reference 100 ns

Compress 1K bytes with Zippy 3,000 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 disk 20,000,000 ns

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

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