From: no.email@nospam.invalid   
      
   Hans Bezemer  writes:   
   > 5. I added GCC extension support to 4tH in version 3.62.0. At the   
   > time, it improved performance by about 25%. By accident I found out   
   > that was no longer true. switch() based was faster. I didn't know   
   > there had been changes in that regard to GCC.   
      
   If you mean the goto *a feature, these days you might try using tail   
   calls instead.  GCC and LLVM both now support a musttail attribute that   
   ensures this optimization, or signals a compile-time error if it can't.   
      
   https://lwn.net/Articles/1033373/   
      
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