siddarthkay
/ install-pr-script.sh
Created
June 2, 2023 03:01
Generate android PR build for status-mobile locally and install on connected android device
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| make release-android BUILD_TYPE=pr | |
| make shell TARGET=android | |
| script/sign-android.sh result/app-pr-unisgned.apk | |
| adb install result/app-pr-signed.apk |
jboner
/ latency.txt
Last active
December 8, 2025 04:24
Latency Numbers Every Programmer Should Know
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| 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 |