Asynchronous (out-of-process) assembly

Adriaan van Os via fpc-pascal <[email protected]> Fri, 24 Jul 2026 07:43:58 +0000 (UTC)
Newsgroups	gmane.comp.compilers.free-pascal.general
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I implemented an option for asynchronous (out-of-process) assembly. On 
Darwin, this makes building for me about 25% faster. With the llvm 
compiler and -O3, I get about 40% more speed (as the code generation 
improvements are done there in the assembly phase).

The patch can be found here 
<https://github.com/AdriaanVanOs/FreePascal-patches>, file 
<https://github.com/AdriaanVanOs/FreePascal-patches/blob/main/async-asm-331.diff>. 
The patch is for Darwin only, but it should be trivial to extend it to 
UNIX and Linux.

I plan to add a patch for 3.2.4 and binary installers for fpc-3.3.1 and 
fpc-3.2.4.

Regards,

Adriaan van Os

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    <br>
    <font face="Helvetica, Arial, sans-serif">I implemented an option
      for asynchronous (out-of-process) assembly. On Darwin, this makes
      building for me about 25% faster. With the llvm compiler and -O3,
      I get about 40% more speed (as the code generation improvements
      are done there in the assembly phase).<br>
      <br>
      The patch can be found here
      <a class="moz-txt-link-rfc2396E" href="https://github.com/AdriaanVanOs/FreePascal-patches">&lt;https://github.com/AdriaanVanOs/FreePascal-patches&gt;</a>, file
<a class="moz-txt-link-rfc2396E" href="https://github.com/AdriaanVanOs/FreePascal-patches/blob/main/async-asm-331.diff">&lt;https://github.com/AdriaanVanOs/FreePascal-patches/blob/main/async-asm-331.diff&gt;</a>.
      The patch is for Darwin only, but it should be trivial to extend
      it to UNIX and Linux.<br>
      <br>
      I plan to add a patch for 3.2.4 and binary installers for
      fpc-3.3.1 and fpc-3.2.4.<br>
      <br>
      Regards,<br>
      <br>
      Adriaan van Os<br>
      <br>
    </font>
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