bm-20250121-azure-x86_64-brandtbucher-remove_optimizer_api-3.14.0a4+-085e172-pystats-argparse_subparsers-vs-base.md

Execution counts

Execution counts for Tier 1 instructions.

The "miss ratio" column shows the percentage of times the instruction executed that it deoptimized. When this happens, the base unspecialized instruction is not counted.

Name	Base Count	Head Count	Change
JUMP_BACKWARD	119,963	7	-100.0%
LOAD_FAST	70,944,657	70,944,657	0.0%
STORE_FAST	17,700,020	17,700,020	0.0%
LOAD_GLOBAL_BUILTIN	16,864,272	16,864,272	0.0%
PUSH_NULL	16,574,251	16,574,251	0.0%
RETURN_VALUE	16,267,342	16,267,342	0.0%
LOAD_FAST_LOAD_FAST	15,181,780	15,181,780	0.0%
RESUME_CHECK	14,880,917	14,880,917	0.0%
LOAD_ATTR_INSTANCE_VALUE	12,333,957	12,333,957	0.0%
LOAD_CONST_IMMORTAL	12,217,699	12,217,699	0.0%
LOAD_GLOBAL_MODULE	10,960,983	10,960,983	0.0%
STORE_ATTR_INSTANCE_VALUE	10,927,280	10,927,280	0.0%
POP_JUMP_IF_FALSE	10,283,705	10,283,705	0.0%
CALL_PY_EXACT_ARGS	9,178,099	9,178,099	0.0%
LOAD_SMALL_INT	8,721,204	8,721,204	0.0%
LOAD_METHOD_NO_DICT	7,029,628	7,029,628	0.0%
POP_TOP	6,788,419	6,788,419	0.0%
POP_JUMP_IF_TRUE	6,375,473	6,375,473	0.0%
NOP	5,339,327	5,339,327	0.0%
LOAD_DEREF	5,161,673	5,161,673	0.0%
LOAD_ATTR_MODULE	5,076,080	5,076,080	0.0%
LOAD_METHOD_WITH_VALUES	5,016,386	5,016,386	0.0%
BUILD_TUPLE	4,860,516	4,860,516	0.0%
TO_BOOL_BOOL	4,616,825	4,616,825	0.0%
BINARY_SUBSCR_DICT	3,696,350	3,696,350	0.0%
LOAD_METHOD	3,645,386	3,645,386	0.0%
POP_JUMP_IF_NOT_NONE	3,139,821	3,139,821	0.0%
ENTER_EXECUTOR	2,736,003	2,736,003	0.0%
CALL_ISINSTANCE	2,732,504	2,732,504	0.0%
LOAD_CONST_MORTAL	2,611,278	2,611,278	0.0%
CHECK_EXC_MATCH	2,603,988	2,603,988	0.0%
POP_EXCEPT	2,603,988	2,603,988	0.0%
PUSH_EXC_INFO	2,603,988	2,603,988	0.0%
TO_BOOL_LIST	2,407,510	2,407,510	0.0%
COMPARE_OP_INT	2,327,943	2,327,943	0.0%
CALL_NON_PY_GENERAL	2,300,566	2,300,566	0.0%
COPY_FREE_VARS	2,219,116	2,219,116	0.0%
CALL_LIST_APPEND	2,210,058	2,210,058	0.0%
COPY	2,080,570	2,080,570	0.0%
CALL_METHOD_DESCRIPTOR_FAST	2,024,575	2,024,575	0.0%
INTERPRETER_EXIT	1,949,784	1,949,784	0.0%
BUILD_LIST	1,762,091	1,762,091	0.0%
CALL_PY_GENERAL	1,694,965	1,694,965	0.0%
GET_ITER	1,665,236	1,665,236	0.0%
POP_JUMP_IF_NONE	1,565,094	1,565,094	0.0%
LOAD_ATTR_SLOT	1,558,665	1,558,665	0.0%
JUMP_BACKWARD_NO_INTERRUPT	1,558,662	1,558,662	0.0%
FOR_ITER_LIST	1,480,715	1,480,715	0.0%
CALL_BUILTIN_FAST	1,442,193	1,442,193	0.0%
CALL_TYPE_1	1,428,905	1,428,905	0.0%
CONTAINS_OP	1,277,990	1,277,990	0.0%
LOAD_ATTR	1,148,918	1,148,918	0.0%
CALL_LEN	1,138,255	1,138,255	0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	1,137,773	1,137,773	0.0%
TO_BOOL_INT	1,049,003	1,049,003	0.0%
CALL_BUILTIN_CLASS	1,047,719	1,047,719	0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	1,043,785	1,043,785	0.0%
BINARY_SUBSCR_GETITEM	1,042,244	1,042,244	0.0%
RAISE_VARARGS	1,042,216	1,042,216	0.0%
RERAISE	1,041,439	1,041,439	0.0%
BINARY_OP_SUBTRACT_INT	1,039,129	1,039,129	0.0%
CALL_BUILTIN_O	909,144	909,144	0.0%
CONTAINS_OP_DICT	842,652	842,652	0.0%
POP_ITER	819,558	819,558	0.0%
CALL_METHOD_DESCRIPTOR_O	785,558	785,558	0.0%
IS_OP	659,645	659,645	0.0%
STORE_SUBSCR_DICT	657,887	657,887	0.0%
BINARY_SUBSCR_STR_INT	620,074	620,074	0.0%
CALL_KW_NON_PY	611,226	611,226	0.0%
BINARY_OP	531,977	531,977	0.0%
CALL_METHOD_DESCRIPTOR_NOARGS	522,728	522,728	0.0%
IMPORT_NAME	521,885	521,885	0.0%
CALL_FUNCTION_EX	520,656	520,656	0.0%
LOAD_SUPER_METHOD_METHOD	520,331	520,331	0.0%
EXIT_INIT_CHECK	519,821	519,821	0.0%
CALL_ALLOC_AND_ENTER_INIT	519,821	519,821	0.0%
BINARY_OP_MULTIPLY_INT	519,562	519,562	0.0%
JUMP_FORWARD	491,336	491,336	0.0%
STORE_FAST_STORE_FAST	405,540	405,540	0.0%
BINARY_OP_ADD_INT	399,097	399,097	0.0%
BINARY_SLICE	399,057	399,057	0.0%
UNPACK_SEQUENCE_TUPLE	393,108	393,108	0.0%
UNPACK_SEQUENCE_LIST	390,313	390,313	0.0%
CALL_STR_1	389,489	389,489	0.0%
BUILD_MAP	366,637	366,637	0.0%
TO_BOOL_STR	364,589	364,589	0.0%
DICT_MERGE	353,685	353,685	0.0%
FOR_ITER_TUPLE	272,450	272,450	0.0%
CALL_KW_PY	268,096	268,096	0.0%
MAKE_CELL	266,577	266,577	0.0%
STORE_DEREF	265,023	265,023	0.0%
COMPARE_OP	264,590	264,590	0.0%
SET_FUNCTION_ATTRIBUTE	261,915	261,915	0.0%
MAKE_FUNCTION	261,656	261,656	0.0%
BINARY_SUBSCR_LIST_INT	96,058	96,058	0.0%
TO_BOOL_NONE	94,052	94,052	0.0%
TO_BOOL	93,726	93,726	0.0%
BINARY_SUBSCR_TUPLE_INT	92,422	92,422	0.0%
CONTAINS_OP_SET	50,895	50,895	0.0%
FORMAT_SIMPLE	21,716	21,716	0.0%
BUILD_STRING	21,716	21,716	0.0%
FOR_ITER_RANGE	16,378	16,378	0.0%
SWAP	8,288	8,288	0.0%
FOR_ITER	8,205	8,205	0.0%
EXTENDED_ARG	7,803	7,803	0.0%
UNPACK_SEQUENCE_TWO_TUPLE	7,057	7,057	0.0%
COMPARE_OP_STR	7,003	7,003	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	5,669	5,669	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	3,885	3,885	0.0%
BINARY_OP_ADD_UNICODE	3,626	3,626	0.0%
LIST_APPEND	3,108	3,108	0.0%
UNARY_INVERT	2,335	2,335	0.0%
LOAD_FAST_AND_CLEAR	1,813	1,813	0.0%
BINARY_SUBSCR	1,398	1,398	0.0%
STORE_SUBSCR	1,090	1,090	0.0%
IMPORT_FROM	777	777	0.0%
LOAD_SUPER_ATTR_ATTR	777	777	0.0%
CALL_INTRINSIC_1	518	518	0.0%
LIST_EXTEND	518	518	0.0%
CALL_BOUND_METHOD_GENERAL	518	518	0.0%
CALL	349	349	0.0%
NOT_TAKEN	300	300	0.0%
CALL_KW_BOUND_METHOD	259	259	0.0%
LOAD_GLOBAL	163	163	0.0%
BINARY_OP_SUBTRACT_FLOAT	64	64	0.0%
LOAD_CONST	31	31	0.0%
UNPACK_SEQUENCE	25	25	0.0%
STORE_ATTR	18	18	0.0%
CALL_KW	11	11	0.0%
RESUME	8	8	0.0%
STORE_SUBSCR_LIST_INT	7	7	0.0%
LOAD_ATTR_PROPERTY	6	6	0.0%
STORE_FAST_LOAD_FAST	5	5	0.0%
UNARY_NOT	4	4	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	2	2	0.0%
LOAD_SUPER_ATTR	1	1	0.0%
LOAD_SUPER_METHOD	1	1	0.0%
CALL_TUPLE_1	1	1	0.0%
JUMP_BACKWARD_JIT		117,632
JUMP_BACKWARD_NO_JIT		2,331

Pair counts

Pair counts for top 100 opcode pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Predecessor/Successor Pairs

Top 5 predecessors and successors of each Tier 1 opcode.

This does not include the unspecialized instructions that occur after a specialized instruction deoptimizes.

Not included in comparative output.

Specialization stats

Specialization stats by family

BINARY_OP

specialization stats for BINARY_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	531,515	18.4%	531,515	18.4%	0.0%
hit ⓘ Specialized instructions that complete.	2,349,263	81.5%	2,349,263	81.5%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	27	5.8%	27	5.8%	0.0%
Failure	435	94.2%	435	94.2%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
and int	178	40.9%	178	40.9%	0.0%
remainder	140	32.2%	140	32.2%	0.0%
multiply different types	93	21.4%	93	21.4%	0.0%
or	24	5.5%	24	5.5%	0.0%

BINARY_SLICE

specialization stats for BINARY_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	399,057	100.0%	399,057	100.0%	0.0%

BINARY_SUBSCR

specialization stats for BINARY_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,306	0.0%	1,306	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	7,924,052	100.0%	7,924,052	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	7	0.0%	7	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	24	26.1%	24	26.1%	0.0%
Failure	68	73.9%	68	73.9%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
out of range	44	64.7%	44	64.7%	0.0%
list slice	24	35.3%	24	35.3%	0.0%

CALL

specialization stats for CALL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	27	0.0%	27	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	31,251,679	100.0%	31,251,679	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	48	0.0%	48	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	323	100.0%	323	100.0%	0.0%
Failure	0	0.0%	0	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
init not simple	1	1 / 0 !!	1	1 / 0 !!	0.0%

CALL_KW

specialization stats for CALL_KW family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	3	27.3%	3	27.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	8	100.0%	8	100.0%	0.0%
Failure	0	0.0%	0	0.0%

COMPARE_OP

specialization stats for COMPARE_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	264,190	5.2%	264,190	5.2%	0.0%
hit ⓘ Specialized instructions that complete.	4,811,576	94.8%	4,811,576	94.8%	0.0%
miss ⓘ Specialized instructions that deopt.	1	0.0%	1	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	25	6.2%	25	6.2%	0.0%
Failure	376	93.8%	376	93.8%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
different types	376	100.0%	376	100.0%	0.0%

CONTAINS_OP

specialization stats for CONTAINS_OP family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,277,422	34.1%	1,277,422	34.1%	0.0%
hit ⓘ Specialized instructions that complete.	2,467,017	65.9%	2,467,017	65.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2	0.4%	2	0.4%	0.0%
Failure	566	99.6%	566	99.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
str	360	63.6%	360	63.6%	0.0%
tuple	138	24.4%	138	24.4%	0.0%
list	68	12.0%	68	12.0%	0.0%

FOR_ITER

specialization stats for FOR_ITER family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	8,056	0.5%	8,056	0.5%	0.0%
hit ⓘ Specialized instructions that complete.	1,769,527	99.5%	1,769,527	99.5%	0.0%
miss ⓘ Specialized instructions that deopt.	16	0.0%	16	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	6	4.0%	6	4.0%	0.0%
Failure	143	96.0%	143	96.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict keys	88	61.5%	88	61.5%	0.0%
zip	45	31.5%	45	31.5%	0.0%
enumerate	8	5.6%	8	5.6%	0.0%
dict values	2	1.4%	2	1.4%	0.0%

LOAD_ATTR

specialization stats for LOAD_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,138,432	2.8%	1,138,432	2.8%	0.0%
hit ⓘ Specialized instructions that complete.	39,281,343	97.1%	39,281,343	97.1%	0.0%
miss ⓘ Specialized instructions that deopt.	14,270	0.0%	14,270	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	252	42.1%	252	42.1%	0.0%
Failure	347	57.9%	347	57.9%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
method	213	61.4%	213	61.4%	0.0%
mutable class	134	38.6%	134	38.6%	0.0%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	14	0.0%	14	0.0%	0.0%
deopt ⓘ Specialized instructions that deopt.	78	0.0%	78	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	27,825,177	100.0%	27,825,177	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	78	0.0%	78	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	170	100.0%	170	100.0%	0.0%
Failure	0	0.0%	0	0.0%

LOAD_METHOD

specialization stats for LOAD_METHOD family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	3,644,211	99.7%	3,644,211	99.7%	0.0%
miss ⓘ Specialized instructions that deopt.	10,049	0.3%	10,049	0.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	118	9.9%	118	9.9%	0.0%
Failure	1,070	90.1%	1,070	90.1%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	780	72.9%	780	72.9%	0.0%
kind 18	134	12.5%	134	12.5%	0.0%

LOAD_SUPER_ATTR

specialization stats for LOAD_SUPER_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	521,108	100.0%	521,108	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1	100.0%	1	100.0%	0.0%
Failure	0	0.0%	0	0.0%

LOAD_SUPER_METHOD

specialization stats for LOAD_SUPER_METHOD family

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1	100.0%	1	100.0%	0.0%
Failure	0	0.0%	0	0.0%

STORE_ATTR

specialization stats for STORE_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	10,919,510	99.9%	10,919,510	99.9%	0.0%
miss ⓘ Specialized instructions that deopt.	7,770	0.1%	7,770	0.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	18	100.0%	18	100.0%	0.0%
Failure	0	0.0%	0	0.0%

STORE_SUBSCR

specialization stats for STORE_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,044	0.2%	1,044	0.2%	0.0%
hit ⓘ Specialized instructions that complete.	658,128	99.8%	658,128	99.8%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1	2.2%	1	2.2%	0.0%
Failure	45	97.8%	45	97.8%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
list slice	45	100.0%	45	100.0%	0.0%

TO_BOOL

specialization stats for TO_BOOL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	93,537	0.8%	93,537	0.8%	0.0%
hit ⓘ Specialized instructions that complete.	11,721,245	99.2%	11,721,245	99.2%	0.0%
miss ⓘ Specialized instructions that deopt.	794	0.0%	794	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	33	17.4%	33	17.4%	0.0%
Failure	157	82.6%	157	82.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
tuple	92	58.6%	92	58.6%	0.0%
dict	44	28.0%	44	28.0%	0.0%
sequence	21	13.4%	21	13.4%	0.0%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1	0.0%	1	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	1,947,541	100.0%	1,947,541	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	24	100.0%	24	100.0%	0.0%
Failure	0	0.0%	0	0.0%

Specialization effectiveness

specialization effectiveness

All entries are execution counts. Should add up to the total number of Tier 1 instructions executed.

Instructions	Base Count	Base Ratio	Head Count	Head Ratio	Change
Specialized hits ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.	153,847,747	40.5%	153,967,710	40.5%	0.1%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	218,673,200	57.6%	218,553,244	57.5%	-0.1%
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	7,372,905	1.9%	7,372,905	1.9%	0.0%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	33,318	0.0%	33,318	0.0%	0.0%

Deferred by instruction

Breakdown of deferred (not specialized) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
LOAD_METHOD	3,644,211	49.5%	3,644,211	49.5%	0.0%
CONTAINS_OP	1,277,422	17.4%	1,277,422	17.4%	0.0%
LOAD_ATTR	1,138,432	15.5%	1,138,432	15.5%	0.0%
BINARY_OP	531,515	7.2%	531,515	7.2%	0.0%
BINARY_SLICE	399,057	5.4%	399,057	5.4%	0.0%
COMPARE_OP	264,190	3.6%	264,190	3.6%	0.0%
TO_BOOL	93,537	1.3%	93,537	1.3%	0.0%
FOR_ITER	8,056	0.1%	8,056	0.1%	0.0%
BINARY_SUBSCR	1,306	0.0%	1,306	0.0%	0.0%
STORE_SUBSCR	1,044	0.0%	1,044	0.0%	0.0%

Misses by instruction

Breakdown of misses (specialized deopts) instruction counts by family

Name	Base Count	Base Ratio	Head Count	Head Ratio	Change
LOAD_ATTR_INSTANCE_VALUE	14,270	42.5%	14,270	42.5%	0.0%
LOAD_METHOD_WITH_VALUES	10,049	29.9%	10,049	29.9%	0.0%
STORE_ATTR_INSTANCE_VALUE	7,770	23.1%	7,770	23.1%	0.0%
TO_BOOL_NONE	770	2.3%	770	2.3%	0.0%
RESUME	285	0.8%	285	0.8%	0.0%
RESUME_CHECK	285	0.8%	285	0.8%	0.0%
LOAD_GLOBAL_BUILTIN	78	0.2%	78	0.2%	0.0%
CALL_PY_EXACT_ARGS	48	0.1%	48	0.1%	0.0%
TO_BOOL_STR	21	0.1%	21	0.1%	0.0%
FOR_ITER_LIST	16	0.0%	16	0.0%	0.0%

Call stats

Inlined calls and frame stats

This shows what fraction of calls to Python functions are inlined (i.e. not having a call at the C level) and for those that are not, where the call comes from. The various categories overlap.

Also includes the count of frame objects created.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Calls to PyEval_EvalDefault	1,949,856	11.6%	1,949,856	11.6%	0.0%
Calls to Python functions inlined	14,839,887	88.4%	14,839,887	88.4%	0.0%
Calls via PyEval_EvalFrame (total)	1,949,856	11.6%	1,949,856	11.6%	0.0%
Calls via PyEval_EvalFrame (vector)	1,949,856	11.6%	1,949,856	11.6%	0.0%
Calls via PyEval_EvalFrame (generator)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (legacy)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (function vectorcall)	1,949,856	11.6%	1,949,856	11.6%	0.0%
Calls via PyEval_EvalFrame (build class)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (slot)	36	0.0%	36	0.0%	0.0%
Calls via PyEval_EvalFrame (function ex)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (api)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (method)	0	0.0%	0	0.0%
Frame objects created	1,565,669	9.3%	1,565,669	9.3%	0.0%
Frames pushed	17,309,564	103.1%	17,309,564	103.1%	0.0%

Object stats

Allocations, frees and dict materializatons

Below, "allocations" means "allocations that are not from a freelist". Total allocations = "Allocations from freelist" + "Allocations".

"Inline values" is the number of values arrays inlined into objects.

The cache hit/miss numbers are for the MRO cache, split into dunder and other names.

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Method cache dunder misses	156		371		137.8%
Method cache misses	1,421,056		1,343,540		-5.5%
Method cache collisions	1,420,375		1,343,177		-5.4%
Method cache hits	7,467,124		7,544,640		1.0%
Immortal increfs	58,293,245	14.3%	58,216,862	14.3%	-0.1%
Immortal decrefs	68,050,549	14.7%	67,974,079	14.7%	-0.1%
Mortal increfs	129,703,319	31.9%	129,625,141	31.9%	-0.1%
Mortal decrefs	136,401,004	29.4%	136,322,891	29.4%	-0.1%
Method cache dunder hits	4,291,562		4,291,347		-0.0%
Frees	25,434,679		25,434,694		0.0%
Allocations from freelist	19,431,388	43.3%	19,431,388	43.3%	0.0%
Frees to freelist	19,432,466		19,432,466		0.0%
Allocations	25,434,395	56.7%	25,434,395	56.7%	0.0%
Allocations to 512 bytes	25,153,358	56.1%	25,153,358	56.1%	0.0%
Allocations to 4 kbytes	274,301	0.6%	274,301	0.6%	0.0%
Allocations over 4 kbytes	6,736	0.0%	6,736	0.0%	0.0%
Inline values	1,300,189		1,300,189		0.0%
Interpreter mortal increfs	162,311,841	39.9%	162,311,841	39.9%	0.0%
Interpreter mortal decrefs	193,168,972	41.7%	193,168,972	41.7%	0.0%
Interpreter immortal increfs	56,447,519	13.9%	56,447,519	13.9%	0.0%
Interpreter immortal decrefs	66,036,710	14.2%	66,036,710	14.2%	0.0%
Materialize dict (on request)	0	0.0%	0	0.0%
Materialize dict (new key)	518	0.0%	518	0.0%	0.0%
Materialize dict (too big)	0	0.0%	0	0.0%
Materialize dict (str subclass)	0	0.0%	0	0.0%

GC stats

GC collections and effectiveness

Collected/visits gives some measure of efficiency.

Generation	Base Collections	Base Objects collected	Base Object visits	Base Reachable from roots	Base Not reachable from roots	Head Collections	Head Objects collected	Head Object visits	Head Reachable from roots	Head Not reachable from roots
0	0	0	0	0	0	0	0	0	0	0
1	1,037	1,557,790	29,431,033	691,427	1,953,183	1,037	1,557,790	29,431,276	691,364	1,953,183
2	0	0	0	0	0	0	0	0	0	0

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Optimization attempts ⓘ The number of times a potential trace is identified. Specifically, this occurs in the JUMP BACKWARD instruction when the counter reaches a threshold.	667		667		0.0%
Traces created ⓘ The number of traces that were successfully created.	323	48.4%	323	48.4%	0.0%
Trace stack overflow ⓘ A trace is truncated because it would require more than 5 stack frames.	0	0.0%	0	0.0%
Trace stack underflow ⓘ A potential trace is abandoned because it pops more frames than it pushes.	449	67.3%	449	67.3%	0.0%
Trace too long ⓘ A trace is truncated because it is longer than the instruction buffer.	0	0.0%	0	0.0%
Trace too short ⓘ A potential trace is abandoned because it it too short.	344	51.6%	344	51.6%	0.0%
Inner loop found ⓘ A trace is truncated because it has an inner loop	0	0.0%	0	0.0%
Recursive call ⓘ A trace is truncated because it has a recursive call.	0	0.0%	0	0.0%
Low confidence ⓘ A trace is abandoned because the likelihood of the jump to top being taken is too low.	0	0.0%	0	0.0%
Executors invalidated ⓘ The number of executors that were invalidated due to watched dictionary changes.	0	0.0%	0	0.0%
Traces executed ⓘ The number of traces that were executed	5,687,548		5,687,548		0.0%
Uops executed ⓘ The total number of uops (micro-operations) that were executed	220,541,474	3,877.6%	220,541,474	3,877.6%	0.0%

	Base Count	Base Ratio	Head Count	Head Ratio	Change
Optimizer attempts ⓘ The number of times the trace optimizer (_Py_uop_analyze_and_optimize) was run.	323		323		0.0%
Optimizer successes ⓘ The number of traces that were successfully optimized.	323	100.0%	323	100.0%	0.0%
Optimizer no memory ⓘ The number of optimizations that failed due to no memory.	0	0.0%	0	0.0%
Remove globals builtins changed ⓘ The builtins changed during optimization	0	0.0%	0	0.0%
Remove globals incorrect keys ⓘ The keys in the globals dictionary aren't what was expected	0	0.0%	0	0.0%

Trace length histogram

trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%
<= 2	0	0.0%	0	0.0%
<= 4	0	0.0%	0	0.0%
<= 8	42	13.0%	42	13.0%	0.0%
<= 16	21	6.5%	21	6.5%	0.0%
<= 32	87	26.9%	87	26.9%	0.0%
<= 64	107	33.1%	107	33.1%	0.0%
<= 128	64	19.8%	64	19.8%	0.0%
<= 256	2	0.6%	2	0.6%	0.0%

Optimized trace length histogram

optimized trace length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%
<= 2	0	0.0%	0	0.0%
<= 4	0	0.0%	0	0.0%
<= 8	63	19.5%	63	19.5%	0.0%
<= 16	0	0.0%	0	0.0%
<= 32	171	52.9%	171	52.9%	0.0%
<= 64	66	20.4%	66	20.4%	0.0%
<= 128	22	6.8%	22	6.8%	0.0%
<= 256	1	0.3%	1	0.3%	0.0%

Trace run length histogram

trace run length histogram

Range	Base Count	Base Ratio	Head Count	Head Ratio	Change
<= 1	0	0.0%	0	0.0%

Uop execution stats

uop execution stats

Name	Base Count	Head Count	Change
_SET_IP	24,972,583	24,972,583	0.0%
_CHECK_VALIDITY	22,841,590	22,841,590	0.0%
_LOAD_FAST	7,894,329	7,894,329	0.0%
_MAKE_WARM	7,568,476	7,568,476	0.0%
_CHECK_PERIODIC	6,950,430	6,950,430	0.0%
_LOAD_FAST_1	6,565,933	6,565,933	0.0%
_CHECK_MANAGED_OBJECT_HAS_VALUES	5,871,741	5,871,741	0.0%
_LOAD_ATTR_INSTANCE_VALUE	5,871,741	5,871,741	0.0%
_CHECK_VALIDITY_AND_SET_IP	5,706,634	5,706,634	0.0%
_START_EXECUTOR	5,687,548	5,687,548	0.0%
_GUARD_IS_TRUE_POP	5,577,134	5,577,134	0.0%
_GUARD_TYPE_VERSION	5,561,816	5,561,816	0.0%
_LOAD_CONST_INLINE	4,943,052	4,943,052	0.0%
_LOAD_FAST_0	4,239,581	4,239,581	0.0%
_EXIT_TRACE	3,941,202	3,941,202	0.0%
_GUARD_IS_FALSE_POP	3,627,822	3,627,822	0.0%
_LOAD_FAST_2	3,225,001	3,225,001	0.0%
_LOAD_DEREF	3,161,358	3,161,358	0.0%
_STORE_FAST	3,161,358	3,161,358	0.0%
_LOAD_FAST_4	3,159,060	3,159,060	0.0%
_LOAD_CONST_INLINE_BORROW	3,088,450	3,088,450	0.0%
_GUARD_NOT_EXHAUSTED_LIST	2,815,357	2,815,357	0.0%
_ITER_CHECK_LIST	2,815,357	2,815,357	0.0%
_PUSH_NULL	2,682,991	2,682,991	0.0%
_PUSH_FRAME	2,130,244	2,130,244	0.0%
_SAVE_RETURN_OFFSET	2,130,244	2,130,244	0.0%
_POP_TOP	2,077,070	2,077,070	0.0%
_JUMP_TO_TOP	1,880,928	1,880,928	0.0%
_CHECK_FUNCTION_EXACT_ARGS	1,877,494	1,877,494	0.0%
_CHECK_FUNCTION_VERSION	1,877,494	1,877,494	0.0%
_DYNAMIC_EXIT	1,746,344	1,746,344	0.0%
_COMPARE_OP_INT	1,703,468	1,703,468	0.0%
_ITER_NEXT_LIST	1,666,117	1,666,117	0.0%
_LOAD_SMALL_INT_0	1,656,270	1,656,270	0.0%
_TIER2_RESUME_CHECK	1,524,920	1,524,920	0.0%
_CHECK_STACK_SPACE	1,493,594	1,493,594	0.0%
_INIT_CALL_PY_EXACT_ARGS_1	1,493,594	1,493,594	0.0%
_CHECK_FUNCTION	1,486,573	1,486,573	0.0%
_GUARD_DORV_VALUES_INST_ATTR_FROM_DICT	1,362,444	1,362,444	0.0%
_GUARD_KEYS_VERSION	1,362,444	1,362,444	0.0%
_LOAD_METHOD_WITH_VALUES	1,362,444	1,362,444	0.0%
_STORE_FAST_6	1,277,478	1,277,478	0.0%
_FORMAT_SIMPLE	1,273,284	1,273,284	0.0%
_BUILD_STRING	1,273,284	1,273,284	0.0%
_STORE_FAST_1	1,150,595	1,150,595	0.0%
_STORE_FAST_4	1,148,898	1,148,898	0.0%
_STORE_FAST_2	1,140,598	1,140,598	0.0%
_CONTAINS_OP_DICT	1,104,775	1,104,775	0.0%
_BUILD_LIST	1,104,533	1,104,533	0.0%
_TO_BOOL_LIST	1,101,689	1,101,689	0.0%
_LOAD_METHOD_NO_DICT	1,056,753	1,056,753	0.0%
_IS_OP	1,028,926	1,028,926	0.0%
_CALL_BUILTIN_FAST	1,028,926	1,028,926	0.0%
_TO_BOOL_BOOL	981,865	981,865	0.0%
_LOAD_FAST_3	970,621	970,621	0.0%
_TO_BOOL_STR	937,960	937,960	0.0%
_BINARY_SUBSCR_STR_INT	937,060	937,060	0.0%
_CONTAINS_OP	937,060	937,060	0.0%
_LOAD_SMALL_INT_1	935,155	935,155	0.0%
_GUARD_IS_NONE_POP	886,684	886,684	0.0%
_STORE_FAST_3	802,666	802,666	0.0%
_FOR_ITER_TIER_TWO	773,678	773,678	0.0%
_UNPACK_SEQUENCE_TWO_TUPLE	773,163	773,163	0.0%
_COMPARE_OP_STR	773,163	773,163	0.0%
_GUARD_BOTH_UNICODE	773,163	773,163	0.0%
_BINARY_SUBSCR_DICT	720,641	720,641	0.0%
_LOAD_FAST_6	672,420	672,420	0.0%
_GUARD_NOT_EXHAUSTED_RANGE	637,410	637,410	0.0%
_ITER_CHECK_RANGE	637,410	637,410	0.0%
_ITER_NEXT_RANGE	636,642	636,642	0.0%
_BINARY_SUBSCR_LIST_INT	552,005	552,005	0.0%
_CALL_LEN	551,255	551,255	0.0%
_GUARD_NOS_INT	551,255	551,255	0.0%
_LOAD_ATTR	550,805	550,805	0.0%
_CONTAINS_OP_SET	468,695	468,695	0.0%
_GUARD_BOTH_INT	384,413	384,413	0.0%
_COPY_FREE_VARS	383,900	383,900	0.0%
_RESUME_CHECK	383,900	383,900	0.0%
_UNPACK_SEQUENCE_TUPLE	383,900	383,900	0.0%
_BINARY_OP_ADD_INT	383,900	383,900	0.0%
_BINARY_SLICE	383,900	383,900	0.0%
_CHECK_CALL_BOUND_METHOD_EXACT_ARGS	383,900	383,900	0.0%
_CHECK_STACK_SPACE_OPERAND	383,900	383,900	0.0%
_GUARD_IS_NOT_NONE_POP	383,900	383,900	0.0%
_INIT_CALL_BOUND_METHOD_EXACT_ARGS	383,900	383,900	0.0%
_INIT_CALL_PY_EXACT_ARGS_2	383,900	383,900	0.0%
_LOAD_FAST_5	383,900	383,900	0.0%
_STORE_FAST_5	383,900	383,900	0.0%
_CALL_METHOD_DESCRIPTOR_O	383,892	383,892	0.0%
_STORE_FAST_0	383,892	383,892	0.0%
_BUILD_TUPLE	336,741	336,741	0.0%
_CALL_METHOD_DESCRIPTOR_FAST	336,210	336,210	0.0%
_GUARD_NOT_EXHAUSTED_TUPLE	254,100	254,100	0.0%
_ITER_CHECK_TUPLE	254,100	254,100	0.0%
_CHECK_FUNCTION_VERSION_KW	252,750	252,750	0.0%
_PY_FRAME_KW	252,750	252,750	0.0%
_TO_BOOL_NONE	168,546	168,546	0.0%
_CALL_NON_PY_GENERAL	168,546	168,546	0.0%
_CHECK_IS_NOT_PY_CALLABLE	168,546	168,546	0.0%
_GET_ITER	168,312	168,312	0.0%
_CALL_KW_NON_PY	168,105	168,105	0.0%
_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	168,105	168,105	0.0%
_CHECK_IS_NOT_PY_CALLABLE_KW	168,105	168,105	0.0%
_LOAD_FAST_7	168,105	168,105	0.0%
_STORE_FAST_7	168,105	168,105	0.0%
_TO_BOOL	167,355	167,355	0.0%
_BINARY_SUBSCR_TUPLE_INT	167,205	167,205	0.0%
_BUILD_MAP	166,905	166,905	0.0%
_DICT_MERGE	166,905	166,905	0.0%
_STORE_SUBSCR_DICT	234	234	0.0%
_DEOPT	2	2	0.0%

Pair counts

Pair counts for top 100 Non-JIT uop pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Not included in comparative output.

Unsupported opcodes

unsupported opcodes

Opcode	Base Count	Head Count	Change
CALL_FUNCTION_EX	43	43	0.0%

Optimizer errored out with opcode

Optimization stopped after encountering this opcode

Rare events

Counts of rare/unlikely events

Event	Base Count	Head Count	Change
set class ⓘ Setting an object's class, obj.__class__ = ...	0	0
set bases ⓘ Setting the bases of a class, cls.__bases__ = ...	0	0
set eval frame func ⓘ Setting the PEP 523 frame eval function _PyInterpreterState_SetFrameEvalFunc()	0	0
builtin dict ⓘ Modifying the builtins, __builtins__.__dict__[var] = ...	0	0
func modification ⓘ Modifying a function, e.g. func.__defaults__ = ..., etc.	0	0
watched dict modification ⓘ A watched dict has been modified	0	0
watched globals modification ⓘ A watched globals() dict has been modified	0	0

Meta stats

Meta statistics

	Base Count	Head Count	Change
Number of data files	21	21	0.0%

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Stats gathered on: 2025-01-22