Just in time compilation and garbage collection. Back in the late 90s/early 2000s when I felt like a C++ expert and computers will still slow enough that performance in everyday code mattered, I thought it was an anathema to waste all those resources on memory graph scans, interpreting bytecode and compiling on the fly. I couldn't have been more wrong. Managed memory and JIT-compiled code is today often better performing than precompiled native machine code.
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Just in time compilation and garbage collection. Back in the late 90s/early 2000s when I felt like a C++ expert and computers will still slow enough that performance in everyday code mattered, I thought it was an anathema to waste all those resources on memory graph scans, interpreting bytecode and compiling on the fly. I couldn't have been more wrong. Managed memory and JIT-compiled code is today often better performing than precompiled native machine code.