OpenJ9 VS KeenWrite

Source

I keep forgetting about J9 but they're not doing themselves any branding favors since there actually is J17 on J9 :-/ https://github.com/eclipse-openj9/openj9/blob/openj9-0.35.0/... (Also that 0.35 versioning ...)

As best I can tell, these are the docker images: https://hub.docker.com/_/ibm-semeru-runtimes

    $ docker run --rm ibm-semeru-runtimes:open-11-jdk java -version

On another note, I'm still not sure if there is a viable way to microbench code running on OpenJ9. It seems that there is still no official support from JMH, at least I'm getting warnings such as "This VM is not supported by JMH. The produced benchmark data can be completely wrong". Apparently it should work, however, my results for runs on OpenJ9 show (by a large margin) much higher variance compared to Hotspot which doesn't exactly inspire confidence.

-Xjit:disableGuardedStaticFinalFieldFoldingFlat out improves performance, working around a bug in -XaggressiveEnables performance optimizations and new platform exploitation that are expected to be the default in future releases of OpenJ9. -Xmns128M -Xmnx1024MSets minimum and maximum size of the nursery for the gencon (default) GC. Having a small nursery allows garbage collection to be really fast, especially with how many short lived objects Minecraft makes. These values shouldn't need to be changed.If you want to know more about the gencon GC and its nursery and tenure zones you can find something here. -XdisableexplicitgcDoesn't allow mods to force a full garbage collection. Removes some lagspikes from misbehaving mods. -Xgc:concurrentScavengeLets gencon GC collect garbage in the background, without stopping the game thread to do it. Gives a very noticeable boost to "smoothness". -Xgc:dnssExpectedTimeRatioMaximum=95 -Xgc:dnssExpectedTimeRatioMinimum=70Lets gencon GC know that it's gotta spend most of its time cleaning up the nursery, instead of the rest of the heap. Most of the garbage is in the nursery instead of the tenure zone so this works incredibly well on modded MC.

I like this part "We continue to employ dozens of developers that work directly and openly in the Eclipse OMR and Eclipse OpenJ9 projects at GitHub. IBM doesn’t produce a separate enterprise version of OpenJ9; we don’t hold back any of the innovation in our runtime."

OpenJ9 (heavily based on OpenJDK, especially later versions): https://github.com/eclipse/openj9/blob/master/jcl/src/java.base/share/classes/java/lang/Throwable.java

In 1.18.16 they "added support for compiling projects with OpenJ9". Turns out the hack to access Hotspot's sun.misc.Unsafe doesn't quite work with OpenJ9 . Oh, really? So surprising. This is exactly the reason why the OpenJDK project pushes their encapsulation agenda so hard!

KeenWrite is my free, open-source, cross-platform desktop Markdown editor that can produce beautifully typeset PDFs. I started working on it years ago to help write a novel that has a complex timeline and I couldn't find a text editor that would allow me to integrate a character sheet with the story itself.

https://github.com/DaveJarvis/keenwrite

Tutorials:

* https://www.youtube.com/playlist?list=PLB-WIt1cZYLm1MMx2FBG9...

Here's what I mean by using variables directly:

* https://www.youtube.com/watch?v=CFCqe3A5dFg

CommonMark doesn't propose a standard for bibliographic references. Would anyone find the editor more appealing if it had cross-references and citations?

My cross-platform desktop text editor, KeenWrite, allows users to define variables in an external YAML file. The editor calls out to Kroki[1] to convert text-based diagrams to SVG. The diagrams can reference variables and are rendered using EchoSVG[2].

KeenWrite[3] can produce PDF documentation from Markdown documents that has PlantUML diagrams with elements stored in an external, machine-readable file. Here are screenshots showing variables on the left, diagram text in the middle, and a real-time render on the right:

* https://raw.githubusercontent.com/DaveJarvis/KeenWrite/main/...

* https://raw.githubusercontent.com/DaveJarvis/KeenWrite/main/...

KeenWrite supports all diagrams offered by Kroki, which includes "diagram-plantuml".

[1]: https://kroki.io/

[2]: https://github.com/css4j/echosvg/

[3]: https://github.com/DaveJarvis/keenwrite

Although not interactive, I've created a video series that shows advanced usage of Markdown. Namely R, external variables, diagrams, math, annotations, and a different approach to metadata:

* https://www.youtube.com/playlist?list=PLB-WIt1cZYLm1MMx2FBG9...

Tutorial 4 shows basic Markdown:

* https://www.youtube.com/watch?v=qNbGSiRzx-0

The top-right of each video shows keyboard and mouse clicks to help follow along.[1] My desktop text editor, KeenWrite[2], is used in the tutorials.

[1]: https://github.com/DaveJarvis/kmcaster

[2]: https://github.com/DaveJarvis/keenwrite

https://github.com/DaveJarvis/keenwrite/blob/main/scripts/bu...

My template script provides a way to make user-friendly shell scripts. In a script that uses the template, you define the dependencies and their sources:

    DEPENDENCIES=(

I didn't create the fork, nor am I affiliated with the project. I use it in my text editor, KeenWrite to rasterize SVG.

KeenWrite Themes[1] are instructions that tell ConTeXt how to typeset XHTML documents (content) into PDF files (presentation). I made a tutorial that shows how my FOSS desktop text editor, KeenWrite[3], allows users to write in Markdown to typeset a document against a particular theme.

Before it can be used for scientific papers, it needs cross-references, which, unfortunately, aren't part of the CommonMark specification.

I posit that the vast majority of LaTeX users don't grok how to separate content from presentation. When I asked a question on TeX.SE about how to adjust the line spacing between enumerated items (spanning a couple dozen enumerated lists), the vast majority of people voted for the answer of using `\itemsep0em` to tweak each list ... individually.[4] The correct answer, IMO, is to fix the problem globally, and not waste time tweaking individual lists.

[1]: https://github.com/DaveJarvis/keenwrite-themes

[2]: https://www.youtube.com/watch?v=3QpX70O5S30

[3]: https://github.com/DaveJarvis/keenwrite

[4]: https://tex.stackexchange.com/questions/6081/reduce-space-be...