[Python-Dev] Re: native code compiler? (or, OCaml vs. Python)

[Skip Montanaro]

    Neal> Right now JUMP_IF_(TRUE, FALSE) keep their computed value on the
    Neal> stack.  They are always followed by POP_TOP.  If the JUMP_IF_*
    Neal> removed the value, it would be one less trip through eval_frame
    Neal> loop (no POP_TOP).  I've got a patch for this which fixes 5 of the
    Neal> 8 cases where JUMP_IF_* are generated.  The problem with the
    Neal> remaining 3 cases is that a jump to a jump occurs.  By removing
    Neal> the jump to a jump, that should also help performance.

See my peephole optimizer reference in an earlier note which (used to)
handle such stuff.  Perhaps it should be dusted off.

Skip