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[Python-Dev] Improving the bytecode

Brett Cannon brett at python.org
Sat Jun 4 12:07:22 EDT 2016 
It's not on the list but I'm hoping to convince Dino to work on END_FINALLY
to be a bit more sane.

On Sat, Jun 4, 2016, 01:17 Serhiy Storchaka <storchaka at gmail.com> wrote:

> Following the converting 8-bit bytecode to 16-bit bytecode (wordcode),
> there are other issues for improving the bytecode.
>
> 1. http://bugs.python.org/issue27129
> Make the bytecode more 16-bit oriented.
>
> 2. http://bugs.python.org/issue27140
> Add new opcode BUILD_CONST_KEY_MAP for building a dict with constant
> keys. This optimize the common case and especially helpful for two
> following issues (creating and calling functions).
>
> 3. http://bugs.python.org/issue27095
> Simplify MAKE_FUNCTION/MAKE_CLOSURE. Instead packing three numbers in
> oparg the new MAKE_FUNCTION takes built tuples and dicts from the stack.
> MAKE_FUNCTION and MAKE_CLOSURE are merged in the single opcode.
>
> 4. http://bugs.python.org/issue27213
> Rework CALL_FUNCTION* opcodes. Replace four existing opcodes with three
> simpler and more efficient opcodes.
>
> 5. http://bugs.python.org/issue27127
> Rework the for loop implementation.
>
> 6. http://bugs.python.org/issue17611
> Move unwinding of stack for "pseudo exceptions" from interpreter to
> compiler.
>
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