[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

Mark Shannon  added the comment:


New changeset 099f75614100e88ed90b68d20a51a8d9c22f81a7 by Mark Shannon in 
branch 'main':
bpo-45923: Decouple suspension of tracing from tracing flag. (GH-31908)
https://github.com/python/cpython/commit/099f75614100e88ed90b68d20a51a8d9c22f81a7


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[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

Change by Mark Shannon :


--
pull_requests: +30001
pull_request: https://github.com/python/cpython/pull/31908

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[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

Mark Shannon  added the comment:


New changeset d7a5aca982def155a9255893cefcc1493c127c9c by Brandt Bucher in 
branch 'main':
bpo-45923: Add `RESUME_QUICK` (GH-31244)
https://github.com/python/cpython/commit/d7a5aca982def155a9255893cefcc1493c127c9c


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[issue45923] Improve performance of sys.settracing based tools.

[Brandt Bucher]

Change by Brandt Bucher :


--
nosy: +brandtbucher
nosy_count: 3.0 -> 4.0
pull_requests: +29413
pull_request: https://github.com/python/cpython/pull/31244

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[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

Mark Shannon  added the comment:


New changeset e028ae99ecee671c0e8a3eabb829b5b2acfc4441 by Mark Shannon in 
branch 'main':
bpo-45923: Handle call events in bytecode (GH-30364)
https://github.com/python/cpython/commit/e028ae99ecee671c0e8a3eabb829b5b2acfc4441


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[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

Change by Mark Shannon :


--
keywords: +patch
pull_requests: +28578
stage:  -> patch review
pull_request: https://github.com/python/cpython/pull/30364

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[issue45923] Improve performance of sys.settracing based tools.

[Mark Shannon]

New submission from Mark Shannon :

In our quest for performance, the performance of sys.settracing based tools has 
probably gotten worse.

1. How do we measure this?
2. How do fix this?

We will initially use coverage.py as proxy for all sys.settracing based tools 
when measuring  performance.

The fix is probably to use quickening to insert a minimum set of 
instrumentation instructions required for tracing/profiling.
The existence of `f_trace_opcode` is a bit of a problem however, as we will 
have to instrument *every* instruction.


Ideally, sys.settracing based tools should be faster on 3.11 than 3.10, but at 
the least we should provide a simple alternative to sys.settracing that is 
faster.

--
assignee: Mark.Shannon
components: Interpreter Core
messages: 407263
nosy: Mark.Shannon, nedbat, pablogsal
priority: normal
severity: normal
status: open
title: Improve performance of sys.settracing based tools.
type: performance
versions: Python 3.11

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