The Speed of Time
Brendan Gregg
SEPTEMBER 25, 2021
This server is spending about a third of its CPU cycles just checking the time! Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? Even with the broken Java stacks, I noticed a big difference: On Ubuntu, there's a massive amount of CPU time in a libjvm call: os::javaTimeMillis().
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