What a magnificently insightful response. Thanks Ben! > On 1 Jun 2025, at 2:37 pm, Ben Weidig <b...@netzgut.net> wrote: > > Hi Geoff, > > We're neither using Less nor Java 8 anymore, but I tried to look into it. > > The less4j library [0] Tapestry uses is a pure Java reimplementation of > Less.js, so I don't think the performance issues come from there. > > Tapestry itself isn't dependent on the processor architecture, as it has no > bundled executables, and the JDK/JRE interprets the generated Bytecode > (also platform independent). > > That's why my guess is that the JDK/JRE 8 variant you're using is the > possible culprit. > According to JEP 391 [1], there wasn't full native macOS/AArch64 support > until OpenJDK 17. > > As far as I understand it, there's no OpenJDK 8 arm64 build especially for > Apple Silicon (I might be wrong on this one). > > However, Azul JDK seems to have backported Apple Silicon support to as low > as 8 [2] > Amazon Coretto also mentions dedicated support [3] > > My first try would be installing Azul or Coretto and testing it again for > performance issues. > > With sdkman [4] or jabba [5], it's simple to install additional JDKs > without polluting the default environment. But I haven't checked if they > have the particular versions available om Mac. > At least jabba is also available via homebrew [6]. > > Cheers > Ben > > [0]: https://github.com/SomMeri/less4j > [1]: https://openjdk.org/jeps/391 > [2]: > https://www.azul.com/newsroom/azul-announces-support-of-java-builds-of-openjdk-for-apple-silicon/ > [3]: > https://github.com/corretto/corretto-8/issues/297#issuecomment-1103974512 > [4]: https://sdkman.io/ > [5]: https://github.com/Jabba-Team/jabba > [6]: https://formulae.brew.sh/formula/jabba > > > > On Sun, Jun 1, 2025 at 5:50 AM JumpStart < > geoff.callender.jumpst...@gmail.com> wrote: > >> On Apple Silicon I’ve just switched from JDK 8 x86 version to JDK 8 arm64 >> version, and I’m finding that while I’m running my Tapestry 5.4 app (in >> Eclipse, debug, with the arm64 JRE selected), the compiling of Less files >> (ResourceTransformerFactoryImpl) is at least 5 times slower. Our Less files >> are big, so this is a major problem during development. >> >> Has anyone else had this problem? Is there a compiler involved that needs >> to be upgraded too? Is there perhaps an arm64 version of Tapestry? >> >> Geoff
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