I am looking for a tool that compares assembly code side by side in order to spot performance differences.

Related similar tool for C#


  • one can enter 2 slightly different, short C++ snippets
  • The tool compares the resulting assembly code and shows a diff side by side
  • x86 and x64 support
  • works on/with


  • while being a big fan, this time, I prefer it . I'll not use it often, so an online version is probably more accessible.
  • explains what the assembly code does, instead of just displaying the Op-codes

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