SergejIsbrecht’s gists

SergejIsbrecht / flamegraph.svg

Created August 22, 2022 09:40

DispatcherBenchmark native-image

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SergejIsbrecht / io.sergejisbrecht.DispatcherBenchmark.baselineExecutorService-AverageTime-blackHoleCnt-1000-dispatcherCnt-20-jobCnt-10000.html

Last active August 22, 2022 09:11

# JMH version: 1.35 # VM version: JDK 11.0.16, OpenJDK 64-Bit Server VM, 11.0.16+7-jvmci-22.3-b03 # VM invoker: /graal/sdk/mxbuild/linux-amd64/GRAALVM_CE_JAVA11/graalvm-ce-java11-22.3.0-dev/bin/java # VM options: -XX:ThreadPriorityPolicy=1 -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCIProduct -XX:-UnlockExperimentalVMOptions -Dfile.encoding=U…

	<!DOCTYPE html>
	<html lang='en'>
	<head>
	<meta charset='utf-8'>
	<style>
	body {margin: 0; padding: 10px; background-color: #ffffff}
	h1 {margin: 5px 0 0 0; font-size: 18px; font-weight: normal; text-align: center}
	header {margin: -24px 0 5px 0; line-height: 24px}
	button {font: 12px sans-serif; cursor: pointer}
	p {margin: 5px 0 5px 0}

SergejIsbrecht / flame_perf_script_symfs.svg

Created September 30, 2021 19:18

Flamegraph created with inferno _with_ symfs (perf record -F99 --call-graph dwarf -- ./Rust_without_dbg ; perf script --symfs ~/Desktop/sysroot/ --kallsyms=/proc/kallsyms | /workspace/Github/inferno/target/release/inferno-collapse-perf > stacks.folded)

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SergejIsbrecht / flame_perf_script.svg

Created September 30, 2021 19:17

Flamegraph created with inferno without symfs (perf record -F99 --call-graph dwarf -- ./Rust_without_dbg ; perf script | /workspace/Github/inferno/target/release/inferno-collapse-perf > stacks.folded)

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SergejIsbrecht / SingleSchedulerWrapper.java

Created January 25, 2021 23:14

Wrap SingleScheduler


	final class SingleSchedulerWrapper extends Scheduler {
	private final Scheduler delegate;

	SingleSchedulerWrapper(Scheduler delegate) {
	this.delegate = Objects.requireNonNull(delegate, "delegate");
	}

	@Override
	public long now(@NonNull TimeUnit unit) {

SergejIsbrecht / scheduler.java

Created January 25, 2021 21:49

State of the RxJava Scheduler + Time

	Scheduler {
	Default:
	Disposable scheduleDirect(@NonNull Runnable run)
	Disposable scheduleDirect(@NonNull Runnable run, long delay, @NonNull TimeUnit unit) // depends on Worker default-impl
	Disposable schedulePeriodicallyDirect(@NonNull Runnable run, long initialDelay, long period, @NonNull TimeUnit unit) // uses now(TimeUnit) transitively from Worker default-impl
	long now(@NonNull TimeUnit unit)
	Abstract:
	abstract Worker createWorker()
	}

SergejIsbrecht / Scheduler.java

Created January 25, 2021 11:09

RxJava

	package io.reactivex.rxjava3.core;

	import io.reactivex.rxjava3.annotations.NonNull;
	import io.reactivex.rxjava3.disposables.Disposable;
	import io.reactivex.rxjava3.plugins.RxJavaPlugins;
	import io.reactivex.rxjava3.schedulers.Schedulers;

	import java.util.Objects;
	import java.util.concurrent.Executors;
	import java.util.concurrent.TimeUnit;

SergejIsbrecht / flame.svg

Created January 17, 2021 16:30

substrate_vm_flamegraph

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SergejIsbrecht / gist:f0d89d4af7fe341ad2096c9da88c8b3b

Last active March 16, 2022 11:13

substrate_vm

	WITHOUT DEBUG SYMBOLS DWARF

	arguments(
	'-H:+PreserveFramePointer',
	'--no-server',
	'--no-fallback',
	'--enable-all-security-services',
	'--report-unsupported-elements-at-runtime'
	)

SergejIsbrecht / timeout.kt

Last active January 11, 2021 12:08

timeout


	@Test
	fun fuck1() {
	val dmb = io.reactivex.schedulers.Schedulers.single()
	val watchDog = io.reactivex.schedulers.Schedulers.from(Executors.newSingleThreadExecutor())


	watchDog.scheduleDirect {
	println("watchDog scheduleDirect " + Thread.currentThread().name)
	}