@Benchmark
    public void baseline_singleton(Blackhole bh) {
        bh.consume(ExceptionA.INSTANCE);
        bh.consume(ExceptionB.INSTANCE);
    }
Microbenchmarks for the verbose exception samplers.
benchmarks/jmh/src/jmh/java/com/linecorp/armeria/common/ExceptionSamplerBenchmark.java