Overhead

LinShunKang edited this page Sep 1, 2019 · 1 revision

MyPerf4J's overhead is so minimal that it is difficult to measure on most applications.

We have to use super fast method with response times in the nanoseconds in order to reliably detect and measure MyPerf4J's overhead.

The benchmark below is run against a not inline empty method (benchmarking is performed using the JMH).

Benchmark environment

JMH version: 1.21
VM version: JDK 1.7.0_80, Java HotSpot(TM) 64-Bit Server VM, 24.80-b11
OS: macOS Mojave 10.14.6
CPU: Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz

Benchmark result

Response times	Baseline	with MyPerf4J	Overhead
Average	2.6 ns	56.8 ns	54.2 ns
90th percentile	≈ 0 ns	≈ 0 ns	≈ 0 ns
95th percentile	≈ 0 ns	1000.0 ns	1000.0 ns
99th percentile	1000.0 ns	1000.0 ns	0.0 ns
99.9th percentile	1000.0 ns	1000.0 ns	0.0 ns

Benchmark details can be found at MyPerf4J-Benchmark