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Issues list

Smarter use of a mutex in incremental HMAC and hash functions extension-modules C modules in the Modules dir performance Performance or resource usage type-feature A feature request or enhancement
#135239 opened Jun 7, 2025 by picnixz
@picnixz
1
Improve statistics.median() complexity performance Performance or resource usage stdlib Python modules in the Lib dir type-feature A feature request or enhancement
#135157 opened Jun 5, 2025 by ryanrudes
9
Increased memory usage with mimalloc interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage type-bug An unexpected behavior, bug, or error
#135153 opened Jun 5, 2025 by nascheme
Automatically defer heavily shared objects in free-threading. interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading type-feature A feature request or enhancement
#134821 opened May 28, 2025 by Fidget-Spinner
2
threading primitives are subject to reference count contention interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading type-feature A feature request or enhancement
#134761 opened May 26, 2025 by ZeroIntensity
_TIER2_RESUME_CHECK is costly in the JIT interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-JIT type-feature A feature request or enhancement
#134728 opened May 26, 2025 by Fidget-Spinner
5
Add Non-Refcounted Operations for common types using _PyStackRef interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading topic-JIT type-feature A feature request or enhancement
#134689 opened May 26, 2025 by Fidget-Spinner
2
Eliminate redundant refcounting in the JIT interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-JIT type-feature A feature request or enhancement
#134584 opened May 23, 2025 by Fidget-Spinner
1
Performance issue with ARM64 windows Python release binaries OS-windows pending The issue will be closed if no feedback is provided performance Performance or resource usage triaged The issue has been accepted as valid by a triager.
#134524 opened May 22, 2025 by Akash9824
9
use stackrefs in _PyObject_GetMethod and calling APIs interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading type-feature A feature request or enhancement
#134043 opened May 15, 2025 by kumaraditya303
@kumaraditya303
LOAD_FAST_BORROW not being used even when safe to do so, if value is live at BB end. 3.15 new features, bugs and security fixes performance Performance or resource usage
#133672 opened May 8, 2025 by markshannon
2
unittest.mock.patch.object holds references for too long performance Performance or resource usage stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error
#133423 opened May 5, 2025 by ppwwyyxx
7
json: Fast path for string encoding awaiting review performance Performance or resource usage
#133239 opened May 1, 2025 by nineteendo Loading…
17
json: Optimize escaping string in Encoder awaiting core review extension-modules C modules in the Modules dir performance Performance or resource usage skip issue
#133186 opened Apr 30, 2025 by methane Loading…
25
Make the JIT thread-safe interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading topic-JIT
#133171 opened Apr 29, 2025 by brandtbucher
7 tasks
@diegorusso @tomasr8
gh-133059: Increase _PY_NSMALLPOSINTS size awaiting merge performance Performance or resource usage
#133160 opened Apr 29, 2025 by dg-pb Loading…
3
Memory keeps increasing with fixed-size dict during multi-threaded set/delete in 3.13.3t interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-free-threading type-bug An unexpected behavior, bug, or error
#133136 opened Apr 29, 2025 by Yiling-J
9
Asyncio BufferedProtocol with SSL is significantly slower than asyncio sockets with SSL performance Performance or resource usage topic-asyncio topic-SSL
#133112 opened Apr 28, 2025 by NoahStapp
Increase _PY_NSMALLPOSINTS size interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage type-feature A feature request or enhancement
#133059 opened Apr 27, 2025 by dg-pb
4
JIT: Optimize common C calls via replication interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage topic-JIT type-feature A feature request or enhancement
#133020 opened Apr 26, 2025 by Fidget-Spinner
4
copy.copy and copy.deepcopy scale poorly with free-threading performance Performance or resource usage stdlib Python modules in the Lib dir topic-free-threading type-bug An unexpected behavior, bug, or error
#132657 opened Apr 17, 2025 by eendebakpt
3
pathlib.Path.move() consumes too much disk space performance Performance or resource usage stdlib Python modules in the Lib dir topic-pathlib type-bug An unexpected behavior, bug, or error
#132566 opened Apr 15, 2025 by barneygale
2
Use tagged ints for faster iteration interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage type-feature A feature request or enhancement
#132554 opened Apr 15, 2025 by markshannon
3
Use tagged pointers for more efficient integer operations. interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage type-feature A feature request or enhancement
#132509 opened Apr 14, 2025 by markshannon
gh-129210: GC optimisations for case where no objects being collected have finalizers awaiting review performance Performance or resource usage
#132488 opened Apr 14, 2025 by duaneg Loading…
10
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