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DRAFT: Experiment with free-threading CI setup

blockingIssue/pull-request is mandatory for the upcoming releaseIssue/pull-request is mandatory for the upcoming release

cat:testTest code / CITest code / CI

prio:high

to-be-backportedPull-requests to be backported to stable branchPull-requests to be backported to stable branch

Status: Draft (not ready).

cupy/cupynumber 9861

#9861 In cupy/cupy;

· seberg opened on Apr 10, 2026

MAINT,BUG: cleanup pending, simplify PooledMemory, use pymutex

blockingIssue/pull-request is mandatory for the upcoming releaseIssue/pull-request is mandatory for the upcoming release

cat:bugBugsBugs

prio:high

Status: Open (in progress).

cupy/cupynumber 9807

#9807 In cupy/cupy;

· seberg opened on Mar 17, 2026

BUG: Introduce a "promotion" step and fix integer comparisons

cat:bugBugsBugs

prio:high

to-be-backportedPull-requests to be backported to stable branchPull-requests to be backported to stable branch

Status: Open (in progress).

cupy/cupynumber 9757

#9757 In cupy/cupy;

· seberg opened on Mar 2, 2026

ENH: Reduce overheads for flags and imports related to FFT

Status: Open (in progress).

cupy/cupynumber 9734

#9734 In cupy/cupy;

· seberg opened on Feb 20, 2026

MAINT,ENH: Refactor kernel argument handling into KernelArguments class

cat:code-fixCode refactoring that do not change behaviorCode refactoring that do not change behavior

prio:medium

to-be-backportedPull-requests to be backported to stable branchPull-requests to be backported to stable branch

Status: Open (in progress).

cupy/cupynumber 9705

#9705 In cupy/cupy;

· seberg opened on Feb 17, 2026

Optimize guess_routine by building tuple directly and caching more

cat:performancePerformance in terms of speed or memory consumptionPerformance in terms of speed or memory consumption

prio:medium

Status: Open (in progress).

cupy/cupynumber 9673

#9673 In cupy/cupy;

· seberg opened on Feb 9, 2026

ENH: (almost) full structured dtype support

cat:featureNew features/APIsNew features/APIs

prio:high

to-be-backportedPull-requests to be backported to stable branchPull-requests to be backported to stable branch

Status: Open (in progress).

cupy/cupynumber 9650

#9650 In cupy/cupy;

· seberg opened on Jan 28, 2026

DEV: Make CUPY_TEST_GPU_LIMIT more reliable.

blockingIssue/pull-request is mandatory for the upcoming releaseIssue/pull-request is mandatory for the upcoming release

cat:testTest code / CITest code / CI

Status: Open (in progress).

cupy/cupynumber 9584

#9584 In cupy/cupy;

· seberg opened on Jan 12, 2026

·  

v15

PERF: Lower thread-local lookup handling into Cython

cat:performancePerformance in terms of speed or memory consumptionPerformance in terms of speed or memory consumption

prio:medium

Status: Open (in progress).

cupy/cupynumber 9534

#9534 In cupy/cupy;

· seberg opened on Dec 18, 2025

Speed up dlpack export and ignore stream for CPU requests

cat:performancePerformance in terms of speed or memory consumptionPerformance in terms of speed or memory consumption

prio:high

to-be-backportedPull-requests to be backported to stable branchPull-requests to be backported to stable branch

Status: Open (in progress).

cupy/cupynumber 9266

#9266 In cupy/cupy;

· seberg opened on Jul 29, 2025