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@ghale
ghale / throttle.gradle
Last active June 20, 2022 13:30
Captures OS X CPU throttling as a custom value/tag
import org.gradle.api.services.BuildService
import org.gradle.api.services.BuildServiceParameters
import java.nio.charset.Charset
import java.util.concurrent.Executors
import java.util.concurrent.ScheduledExecutorService
import java.util.concurrent.TimeUnit
/**
* This Gradle script captures the thermal stats as reported by the OS 'pmset' command,
@jboner
jboner / latency.txt
Last active July 24, 2024 06:44
Latency Numbers Every Programmer Should Know
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