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Intern string representation of operators and some other symbolic literals

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#136757 In python/cpython;

·abebus openedon Jul 18, 2025

Slow functions calls for C-coded functions, accepting positional-or-kwarg argument vs positional-only

performancePerformance or resource usagePerformance or resource usage

topic-argument-clinic

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#136681 In python/cpython;

·skirpichev openedon Jul 15, 2025

Improve long_hash

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#136599 In python/cpython;

·eendebakpt openedon Jul 12, 2025

Switching between the JIT and interpreter is too slow.

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#136410 In python/cpython;

·markshannon openedon Jul 8, 2025

gh-132657: Avoid locks and refcounts in frozenset operations

awaiting review

performancePerformance or resource usagePerformance or resource usage

Status: Open (in progress).

python/cpythonnumber 136107

#136107 In python/cpython;

·eendebakpt openedon Jun 29, 2025

<code>asyncio.to_thread</code> could be a lot more efficient

performancePerformance or resource usagePerformance or resource usage

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-asyncio

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#136084 In python/cpython;

·HansBrende openedon Jun 29, 2025

Support chunk sending in <code>smtplib</code>

performancePerformance or resource usagePerformance or resource usage

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-email

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#135952 In python/cpython;

·jsbucy openedon Jun 25, 2025

Optimize the JIT's low-level assembly control flow

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#135904 In python/cpython;

·brandtbucher openedon Jun 24, 2025

Increased memory usage with free-threaded build

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

triagedThe issue has been accepted as valid by a triager.The issue has been accepted as valid by a triager.

Status: Open.

#135898 In python/cpython;

·nascheme openedon Jun 24, 2025

Implement Py_DECREF specializations for Py_GIL_DISABLED build

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#135832 In python/cpython;

·alex-semenyuk openedon Jun 23, 2025

use argument clinic for more socket functions

extension-modulesC modules in the Modules dirC modules in the Modules dir

performancePerformance or resource usagePerformance or resource usage

type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

Status: Open.

#135748 In python/cpython;

·kumaraditya303 openedon Jun 20, 2025

Objects with both <code>__slots__</code> and <code>__dict__</code> have much larger size than needed (up to 4x) on Python 3.13

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

performancePerformance or resource usagePerformance or resource usage

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#135385 In python/cpython;

·ariebovenberg openedon Jun 11, 2025