23406195774
95%

Ran 22 Mar 2026 03:25PM UTC

Jobs 1

Files 8

Run time 1min

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Committed 22 Mar 2026 03:24PM UTC coverage: 94.565% (+0.02%) from 94.55%

Build # 23406195774

Build Type

push

github

Committed by

web-flow

Commit Message

Stack allocate small strings (#270)

* normalize str_errors='error' to 'strict'

'error' was never a valid Python string error handler. Accept it for
backwards compatibility but normalize to 'strict' internally. Update
error messages to only mention valid options.

* fix str_errors handling in C string decoder

The C implementation of decode_definite_short_string was not respecting
the str_errors setting - it always used PyUnicode_FromStringAndSize which
only supports strict mode. Now uses PyUnicode_DecodeUTF8 with the
str_errors field passed directly.

Store str_errors as const char* (NULL for strict, "replace" for replace)
instead of PyObject*. This eliminates a conditional in the hot path since
PyUnicode_DecodeUTF8 accepts NULL to mean strict mode.

Fixes #255

* use fp_read directly in string decoder

Skip creating an intermediate Python bytes object by using fp_read
directly into a PyMem_Malloc buffer. This avoids Python allocator and
reference counting overhead.

* stack allocate small strings in C decoder

Use a stack buffer for strings <= 256 bytes to avoid heap allocation
overhead. Larger strings continue to use PyMem_Malloc.

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Alex Grönholm <alex.gronholm@nextday.fi>

Run Details

1044 of 1104 relevant lines covered (94.57%)

10.33 hits per line

Uncovered Existing Lines

Lines	Coverage	∆	File
14	95.91	0.03%	_decoder.py

Jobs

ID	Job ID	Ran	Files	Coverage
1	23406195774.1	22 Mar 2026 03:25PM UTC	8	94.57	GitHub Action Run

agronholm / cbor2 / 23406195774
95%

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agronholm / cbor2 / 23406195774 95%

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