[ python-Bugs-884020 ] opcode prediction distorts dynamic execution profile stats

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Bugs item #884020, was opened at 2004-01-25 17:34
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Category: Python Interpreter Core
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Andrew I MacIntyre (aimacintyre)
Assigned to: Nobody/Anonymous (nobody)
Summary: opcode prediction distorts dynamic execution profile stats

Initial Comment:
By defining DYNAMIC_EXECUTION_PROFILE (and DXPAIRS if
you want opcode pair counts), opcode frequencies can be
evaluated for various program runs.

However successful opcode predictions bypass the
counter updates, which happen at the top of the loop.

So the result can be significantly under-represented
opcodes in the total statistics.

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