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Re: Storing Bytecode Offset

From: Andrea Corallo
Subject: Re: Storing Bytecode Offset
Date: Mon, 13 Jul 2020 08:01:42 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Rocky Bernstein <rocky@gnu.org> writes:

> Andrea also suggested giving up on the most recent offset and keeping
> offsets in the backtrace.

To be precise this is somenthing I mentioned as a possibility if none of
the other perf impact mitigations works out sufficiently.

> We think that this is bad in that the most-recent position is the one
> that is most desired.

Anyway IMO would be probably more fruitful to focus on the byte compiler
preserving location topic as first.  This is has a value by its own
allowing for emitting correct diagnostic *and* is a pre for having the
bytecode offset thing useful.



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