PyO3
pyo3
BlogDocsChangelog

replace `DowncastError` with `CastError`

#5468Merged
Comparing
davidhewitt:cast-error
(
4d64fbb
) with
main
(
d9e2c50
)
CodSpeed Performance Gauge
+12%
Improvements
1
Untouched
97
Ignored
21

Benchmarks

Improved

extract_str_extract_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+12%
2 µs1.7 µs

Passed

test_getter
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+6%
17.3 µs16.3 µs
list_nth
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+4%
3.8 µs3.7 µs
clean_attach
pyo3-benches/benches/bench_attach.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+3%
3.5 µs3.4 µs
err_new_without_gil
pyo3-benches/benches/bench_err.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+2%
1.3 µs1.2 µs
list_nth_back
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+2%
3.9 µs3.8 µs
byte_slice_into_pyobject_medium
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+2%
1.6 µs1.6 µs
bytes_new_medium
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+2%
1.6 µs1.6 µs
test_simple_args_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+2%
19 µs18.7 µs
test_args_kwargs_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
14.5 µs14.3 µs
vec_bytes_from_py_bytearray_medium
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
2.1 µs2.1 µs
first_time_init
pyo3-benches/benches/bench_pyclass.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
39.9 µs39.4 µs
test_method_call_py
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+1%
13.9 µs13.7 µs
tuple_nth
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
3.7 µs3.7 µs
tuple_nth_back
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
3.8 µs3.7 µs
err_new_restore_and_fetch
pyo3-benches/benches/bench_err.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
7.8 µs7.7 µs
test_simple_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
17.5 µs17.3 µs
test_with_typed_args_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
13.7 µs13.5 µs
test_simple_args_kwargs_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
19.1 µs19 µs
drop_many_objects
pyo3-benches/benches/bench_py.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
3.8 µs3.7 µs
test_setter
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+1%
16.8 µs16.7 µs
test_none_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
12.7 µs12.6 µs
test_class_method
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+1%
17.9 µs17.7 µs
test_positional_only_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
+1%
13.8 µs13.7 µs
extract_hashbrown_map
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
17.1 ms17 ms
test_proto_call_py
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+1%
14.4 µs14.4 µs
iter_tuple
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
+1%
5.2 ms5.2 ms
test_empty_class_init
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
+1%
23.5 µs23.4 µs
test_simple_kwargs_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
18.6 µs18.5 µs
iter_list
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
5.8 ms5.7 ms
tuple_get_borrowed_item_unchecked
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
2.9 ms2.9 ms
identify_object_type
pyo3-benches/benches/bench_any.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
15.8 µs15.7 µs
tuple_get_item_unchecked
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
3.1 ms3.1 ms
test_none_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
13.3 µs13.3 µs
list_get_item_unchecked
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
3.2 ms3.2 ms
call_method
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
1.3 ms1.3 ms
test_class_attribute
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
0%
14.1 µs14 µs
tuple_get_borrowed_item
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
3.6 ms3.6 ms
tuple_get_item
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
3.8 ms3.8 ms
list_get_item
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
3.9 ms3.9 ms
test_simple_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
18.2 µs18.2 µs
test_simple_args_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
17.9 µs17.8 µs
extract_hashmap
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
19.8 ms19.7 ms
iter_set
pyo3-benches/benches/bench_set.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
10.3 ms10.3 ms
iter_dict
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
11 ms11 ms
test_with_typed_args_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
17.1 µs17.1 µs
test_positional_only_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
13.5 µs13.4 µs
test_empty_class_init_py
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
0%
14 µs14 µs
test_many_keyword_arguments_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
16.8 µs16.8 µs
extract_hashbrown_set
pyo3-benches/benches/bench_set.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
15.8 ms15.8 ms
test_static_method
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
0%
15.7 µs15.6 µs
extract_btreeset
pyo3-benches/benches/bench_set.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
15.3 ms15.3 ms
extract_btreemap
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
37 ms36.9 ms
extract_hashset
pyo3-benches/benches/bench_set.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
20.3 ms20.3 ms
test_simple_kwargs_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
20.4 µs20.4 µs
dict_get_item
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
16.3 ms16.3 ms
call_1
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
253.5 µs253.4 µs
vec_bytes_from_py_bytes_large
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
177.8 µs177.7 µs
byte_slice_into_pyobject_large
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
176.8 µs176.7 µs
test_args_kwargs_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
18.9 µs18.9 µs
list_new
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
6.7 ms6.7 ms
call_method_one_arg
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
628 µs628 µs
call_method_1
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
657.5 µs657.5 µs
dict_new
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
25.7 ms25.7 ms
collect_generic_iterator
pyo3-benches/benches/bench_any.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
95.8 ms95.8 ms
tuple_new_list
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
2 ms2 ms
dirty_attach
pyo3-benches/benches/bench_attach.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
5.1 µs5.1 µs
tuple_into_pyobject
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
2.9 µs2.9 µs
extract_bigint_extract_fail
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
11.8 µs11.8 µs
call
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
609.5 µs609.5 µs
call_0
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
191.6 µs191.6 µs
vec_into_pyobject
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
2.5 µs2.5 µs
extract_float_extract_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
11.7 µs11.7 µs
extract_int_extract_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
11.6 µs11.6 µs
tuple_to_list
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
1.6 ms1.6 ms
set_new
pyo3-benches/benches/bench_set.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
15.2 ms15.2 ms
bytes_new_large
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
176.7 µs176.7 µs
test_method_call
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
0%
14.8 µs14.8 µs
tuple_new
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
6.7 ms6.7 ms
ordered_dunder_methods
pyo3-benches/benches/bench_comparisons.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
2.7 µs2.7 µs
call_one_arg
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
232.1 µs232.1 µs
vec_bytes_from_py_bytearray_large
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
178 µs178 µs
call_method_0
pyo3-benches/benches/bench_call.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
608.2 µs608.4 µs
drop_many_objects_without_gil
pyo3-benches/benches/bench_py.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
44.8 µs44.8 µs
test_simple_args_kwargs_py
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
20.6 µs20.7 µs
test_proto_call
pytests/tests/test_pyclasses.py
CodSpeed Performance Gauge
0%
13.4 µs13.4 µs
extract_bigint_huge_negative
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
13 µs13.1 µs
enum_from_pyobject
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
0%
23.9 µs24 µs
test_many_keyword_arguments_rs
pytests/tests/test_pyfunctions.py
CodSpeed Performance Gauge
0%
18.7 µs18.8 µs
extract_bigint_huge_positive
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-1%
11.5 µs11.6 µs
decimal_via_extract
pyo3-benches/benches/bench_decimal.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-1%
14.9 µs15 µs
vec_bytes_from_py_bytes_medium
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-1%
2.1 µs2.1 µs
extract_bigint_big_positive
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-2%
3.6 µs3.7 µs
getattr_intern
pyo3-benches/benches/bench_intern.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-2%
3.3 µs3.4 µs
extract_bigint_big_negative
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-2%
3.8 µs3.9 µs
ordered_richcmp
pyo3-benches/benches/bench_comparisons.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-2%
2.4 µs2.5 µs
extract_bigint_small
pyo3-benches/benches/bench_bigint.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-4%
2.5 µs2.6 µs
not_a_list_via_extract_enum
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
CodSpeed Performance Gauge
-8%
17.8 µs19.4 µs

Ignored

extract_str_extract_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+5%
550 ns522.5 ns
not_a_list_via_cast
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+1%
214.4 ns211.9 ns
list_via_cast
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
-16%
149.2 ns178.3 ns
sequence_from_tuple
pyo3-benches/benches/bench_tuple.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+11%
301.7 ns272.5 ns
list_via_extract
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
0%
183.9 ns183.9 ns
not_a_list_via_extract
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+1%
214.4 ns211.9 ns
vec_bytes_from_py_bytearray_small
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
0%
865.3 ns865.3 ns
vec_bytes_from_py_bytes_small
pyo3-benches/benches/bench_frompyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
0%
862.5 ns862.5 ns
getattr_direct
pyo3-benches/benches/bench_intern.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
0%
6.6 µs6.6 µs
byte_slice_into_pyobject_small
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+10%
335 ns305.8 ns
sequence_from_list
pyo3-benches/benches/bench_list.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+24%
301.7 ns243.3 ns
bytes_new_small
pyo3-benches/benches/bench_intopyobject.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+10%
335 ns305.8 ns
mapping_from_dict
pyo3-benches/benches/bench_dict.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
-11%
243.3 ns272.5 ns
extract_float_cast_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+9%
398.1 ns366.4 ns
extract_float_cast_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
-16%
149.2 ns178.3 ns
extract_float_extract_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
-26%
244.4 ns331.9 ns
extract_int_cast_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+6%
490.3 ns461.1 ns
extract_int_extract_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
-6%
426.9 ns456.1 ns
extract_int_cast_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+30%
277.5 ns213.1 ns
extract_str_cast_success
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
0%
495.6 ns495.6 ns
extract_str_cast_fail
pyo3-benches/benches/bench_extract.rs::benches::criterion_benchmark
Ignored
CodSpeed Performance Gauge
+15%
243.6 ns211.9 ns

Commits

Click on a commit to change the comparison range
Base
main
d9e2c50
-10.16%
newsfragment, CI
d2a8508
28 days ago
by davidhewitt
+10.43%
migration guide entry
650c12c
16 days ago
by davidhewitt
+12.07%
fixup docs
4d64fbb
16 days ago
by davidhewitt
© 2025 CodSpeed Technology
Home Terms Privacy Docs