bm-20250121-azure-x86_64-brandtbucher-remove_optimizer_api-3.14.0a4+-085e172-pystats-genshi-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	512,110	98	-100.0%
LOAD_FAST	162,281,041	162,281,041	0.0%
LOAD_GLOBAL_MODULE	64,511,389	64,511,389	0.0%
STORE_FAST	60,636,558	60,636,558	0.0%
POP_JUMP_IF_FALSE	59,190,332	59,190,332	0.0%
IS_OP	44,548,187	44,548,187	0.0%
YIELD_VALUE	40,426,059	40,426,059	0.0%
PUSH_NULL	26,044,365	26,044,365	0.0%
LOAD_CONST_IMMORTAL	22,982,220	22,982,220	0.0%
RESUME_CHECK	22,939,802	22,939,802	0.0%
LOAD_SMALL_INT	22,212,244	22,212,244	0.0%
BINARY_SUBSCR_TUPLE_INT	20,710,351	20,710,351	0.0%
LOAD_FAST_LOAD_FAST	18,091,299	18,091,299	0.0%
RETURN_VALUE	15,731,897	15,731,897	0.0%
BUILD_TUPLE	12,995,049	12,995,049	0.0%
POP_TOP	11,759,062	11,759,062	0.0%
INTERPRETER_EXIT	10,920,666	10,920,666	0.0%
STORE_FAST_STORE_FAST	10,875,311	10,875,311	0.0%
UNPACK_SEQUENCE_TUPLE	10,865,153	10,865,153	0.0%
TO_BOOL_BOOL	10,493,923	10,493,923	0.0%
ENTER_EXECUTOR	9,222,826	9,222,826	0.0%
POP_JUMP_IF_TRUE	9,005,206	9,005,206	0.0%
LOAD_GLOBAL_BUILTIN	8,814,520	8,814,520	0.0%
CALL_PY_EXACT_ARGS	6,977,019	6,977,019	0.0%
LOAD_ATTR	6,399,837	6,399,837	0.0%
LOAD_ATTR_MODULE	6,069,922	6,069,922	0.0%
TO_BOOL	5,670,189	5,670,189	0.0%
CALL_STR_1	5,418,844	5,418,844	0.0%
CALL_ISINSTANCE	5,411,042	5,411,042	0.0%
LOAD_NAME	4,825,852	4,825,852	0.0%
POP_JUMP_IF_NONE	4,747,974	4,747,974	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	4,635,722	4,635,722	0.0%
BUILD_MAP	4,633,618	4,633,618	0.0%
CALL_BUILTIN_FAST	3,675,856	3,675,856	0.0%
CALL_NON_PY_GENERAL	3,223,508	3,223,508	0.0%
GET_ITER	3,019,097	3,019,097	0.0%
TO_BOOL_LIST	2,770,850	2,770,850	0.0%
LOAD_METHOD_NO_DICT	2,707,413	2,707,413	0.0%
FOR_ITER	2,597,419	2,597,419	0.0%
LOAD_ATTR_SLOT	2,514,975	2,514,975	0.0%
LOAD_ATTR_INSTANCE_VALUE	2,358,348	2,358,348	0.0%
CONTAINS_OP_DICT	2,348,598	2,348,598	0.0%
LOAD_METHOD	2,338,442	2,338,442	0.0%
LOAD_METHOD_WITH_VALUES	2,331,550	2,331,550	0.0%
SWAP	2,136,507	2,136,507	0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	2,124,150	2,124,150	0.0%
BINARY_SUBSCR_DICT	2,123,935	2,123,935	0.0%
TO_BOOL_INT	845,965	845,965	0.0%
CONTAINS_OP_SET	774,340	774,340	0.0%
JUMP_FORWARD	716,092	716,092	0.0%
COMPARE_OP	709,818	709,818	0.0%
POP_ITER	568,236	568,236	0.0%
LOAD_CONST_MORTAL	526,313	526,313	0.0%
EXTENDED_ARG	519,017	519,017	0.0%
NOP	423,218	423,218	0.0%
CALL_BUILTIN_O	400,394	400,394	0.0%
CALL_METHOD_DESCRIPTOR_FAST	312,631	312,631	0.0%
FOR_ITER_GEN	285,386	285,386	0.0%
CALL_PY_GENERAL	274,492	274,492	0.0%
FOR_ITER_LIST	223,022	223,022	0.0%
CALL_TYPE_1	215,181	215,181	0.0%
POP_JUMP_IF_NOT_NONE	209,162	209,162	0.0%
COPY_FREE_VARS	201,309	201,309	0.0%
BINARY_SUBSCR	201,206	201,206	0.0%
STORE_SUBSCR_DICT	200,924	200,924	0.0%
RETURN_GENERATOR	196,222	196,222	0.0%
BINARY_SUBSCR_LIST_INT	196,078	196,078	0.0%
CALL_FUNCTION_EX	195,322	195,322	0.0%
END_FOR	194,863	194,863	0.0%
DICT_MERGE	194,550	194,550	0.0%
NOT_TAKEN	194,504	194,504	0.0%
CALL_BUILTIN_CLASS	194,127	194,127	0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	184,757	184,757	0.0%
CALL_KW_NON_PY	129,437	129,437	0.0%
LIST_APPEND	129,286	129,286	0.0%
FOR_ITER_RANGE	128,609	128,609	0.0%
UNPACK_SEQUENCE_TWO_TUPLE	80,427	80,427	0.0%
FOR_ITER_TUPLE	76,512	76,512	0.0%
CALL_LEN	20,844	20,844	0.0%
COMPARE_OP_INT	18,868	18,868	0.0%
STORE_ATTR_INSTANCE_VALUE	16,798	16,798	0.0%
BUILD_LIST	13,206	13,206	0.0%
COPY	11,931	11,931	0.0%
CALL_LIST_APPEND	9,701	9,701	0.0%
BINARY_OP	9,235	9,235	0.0%
BINARY_OP_ADD_UNICODE	7,233	7,233	0.0%
CALL	6,271	6,271	0.0%
LOAD_DEREF	5,290	5,290	0.0%
TO_BOOL_STR	4,811	4,811	0.0%
STORE_ATTR_SLOT	4,512	4,512	0.0%
CALL_KW_BOUND_METHOD	4,094	4,094	0.0%
TO_BOOL_NONE	4,048	4,048	0.0%
LOAD_GLOBAL	3,666	3,666	0.0%
CONTAINS_OP	3,509	3,509	0.0%
STORE_ATTR	3,467	3,467	0.0%
BINARY_OP_ADD_INT	3,394	3,394	0.0%
CHECK_EXC_MATCH	3,370	3,370	0.0%
POP_EXCEPT	3,370	3,370	0.0%
PUSH_EXC_INFO	3,370	3,370	0.0%
JUMP_BACKWARD_NO_INTERRUPT	3,358	3,358	0.0%
MAKE_CELL	2,728	2,728	0.0%
COMPARE_OP_STR	2,564	2,564	0.0%
CALL_METHOD_DESCRIPTOR_O	2,469	2,469	0.0%
MAKE_FUNCTION	2,315	2,315	0.0%
CALL_KW_PY	2,060	2,060	0.0%
SET_FUNCTION_ATTRIBUTE	1,896	1,896	0.0%
STORE_SUBSCR_LIST_INT	1,848	1,848	0.0%
LOAD_FAST_AND_CLEAR	1,815	1,815	0.0%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	1,592	1,592	0.0%
BINARY_SLICE	1,562	1,562	0.0%
LOAD_CONST	1,440	1,440	0.0%
EXIT_INIT_CHECK	1,267	1,267	0.0%
CALL_ALLOC_AND_ENTER_INIT	1,267	1,267	0.0%
BINARY_OP_SUBTRACT_INT	1,265	1,265	0.0%
IMPORT_FROM	1,260	1,260	0.0%
IMPORT_NAME	1,234	1,234	0.0%
DELETE_SUBSCR	1,106	1,106	0.0%
STORE_DEREF	1,047	1,047	0.0%
CALL_TUPLE_1	844	844	0.0%
LOAD_ATTR_NONDESCRIPTOR_NO_DICT	770	770	0.0%
UNPACK_SEQUENCE	668	668	0.0%
TO_BOOL_ALWAYS_TRUE	644	644	0.0%
RESUME	632	632	0.0%
CALL_METHOD_DESCRIPTOR_NOARGS	580	580	0.0%
LIST_EXTEND	459	459	0.0%
CALL_INTRINSIC_1	453	453	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	393	393	0.0%
BINARY_SUBSCR_STR_INT	385	385	0.0%
STORE_FAST_LOAD_FAST	319	319	0.0%
BINARY_SUBSCR_GETITEM	297	297	0.0%
LOAD_SUPER_METHOD_METHOD	260	260	0.0%
STORE_SLICE	258	258	0.0%
STORE_NAME	258	258	0.0%
UNPACK_SEQUENCE_LIST	256	256	0.0%
CALL_KW	236	236	0.0%
LOAD_ATTR_PROPERTY	225	225	0.0%
LOAD_METHOD_LAZY_DICT	193	193	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	155	155	0.0%
BINARY_OP_SUBTRACT_FLOAT	127	127	0.0%
STORE_SUBSCR	70	70	0.0%
DELETE_ATTR	64	64	0.0%
LOAD_SPECIAL	36	36	0.0%
UNARY_NOT	31	31	0.0%
BINARY_OP_MULTIPLY_INT	22	22	0.0%
LOAD_BUILD_CLASS	18	18	0.0%
LOAD_LOCALS	18	18	0.0%
LOAD_FAST_CHECK	15	15	0.0%
UNARY_INVERT	8	8	0.0%
LOAD_SUPER_METHOD	4	4	0.0%
COMPARE_OP_FLOAT	2	2	0.0%
LOAD_ATTR_CLASS	2	2	0.0%
JUMP_BACKWARD_JIT		511,937
JUMP_BACKWARD_NO_JIT		173

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.	8,438	39.4%	8,438	39.4%	0.0%
hit ⓘ Specialized instructions that complete.	12,196	56.9%	12,196	56.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	173	21.7%	173	21.7%	0.0%
Failure	624	78.3%	624	78.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
remainder	363	58.2%	363	58.2%	0.0%
add other	131	21.0%	131	21.0%	0.0%
multiply different types	129	20.7%	129	20.7%	0.0%
and int	1	0.2%	1	0.2%	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.	1,562	100.0%	1,562	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.	200,453	0.9%	200,453	0.9%	0.0%
hit ⓘ Specialized instructions that complete.	23,031,013	99.1%	23,031,013	99.1%	0.0%
miss ⓘ Specialized instructions that deopt.	33	0.0%	33	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	190	25.2%	190	25.2%	0.0%
Failure	563	74.8%	563	74.8%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
out of range	309	54.9%	309	54.9%	0.0%
list slice	146	25.9%	146	25.9%	0.0%
tuple slice	108	19.2%	108	19.2%	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.	1,736	0.0%	1,736	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	43,312,676	100.0%	43,312,676	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	3,966	0.0%	3,966	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	4,578	100.0%	4,578	100.0%	0.0%
Failure	0	0.0%	0	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
init not python	21	21 / 0 !!	21	21 / 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.	28	11.9%	28	11.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	208	100.0%	208	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.	709,239	47.4%	709,239	47.4%	0.0%
hit ⓘ Specialized instructions that complete.	785,457	52.5%	785,457	52.5%	0.0%
miss ⓘ Specialized instructions that deopt.	10	0.0%	10	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	176	30.4%	176	30.4%	0.0%
Failure	403	69.6%	403	69.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
different types	266	66.0%	266	66.0%	0.0%
tuple	93	23.1%	93	23.1%	0.0%
other	43	10.7%	43	10.7%	0.0%
big int	1	0.2%	1	0.2%	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.	3,169	0.1%	3,169	0.1%	0.0%
hit ⓘ Specialized instructions that complete.	3,923,987	99.9%	3,923,987	99.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	8	2.4%	8	2.4%	0.0%
Failure	332	97.6%	332	97.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
str	200	60.2%	200	60.2%	0.0%
list	89	26.8%	89	26.8%	0.0%
other	43	13.0%	43	13.0%	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.	2,596,181	7.4%	2,596,181	7.4%	0.0%
hit ⓘ Specialized instructions that complete.	32,563,421	92.6%	32,563,421	92.6%	0.0%
miss ⓘ Specialized instructions that deopt.	2,496	0.0%	2,496	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	99	8.0%	99	8.0%	0.0%
Failure	1,146	92.0%	1,146	92.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	599	52.3%	599	52.3%	0.0%
dict values	137	12.0%	137	12.0%	0.0%
zip	117	10.2%	117	10.2%	0.0%
itertools	105	9.2%	105	9.2%	0.0%
dict keys	90	7.9%	90	7.9%	0.0%
set	53	4.6%	53	4.6%	0.0%
enumerate	23	2.0%	23	2.0%	0.0%
dict items	22	1.9%	22	1.9%	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.	6,394,712	27.5%	6,394,712	27.5%	0.0%
hit ⓘ Specialized instructions that complete.	16,822,305	72.4%	16,822,305	72.4%	0.0%
miss ⓘ Specialized instructions that deopt.	3,634	0.0%	3,634	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,164	43.9%	2,164	43.9%	0.0%
Failure	2,764	56.1%	2,764	56.1%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
class method obj	1,706	61.7%	1,706	61.7%	0.0%
method	769	27.8%	769	27.8%	0.0%
class attr simple	141	5.1%	141	5.1%	0.0%
metaclass attribute	100	3.6%	100	3.6%	0.0%
overriding descriptor	48	1.7%	48	1.7%	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.	500	0.0%	500	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	73,324,051	100.0%	73,324,051	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	1,858	0.0%	1,858	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,166	100.0%	3,166	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.	2,336,234	99.9%	2,336,234	99.9%	0.0%
miss ⓘ Specialized instructions that deopt.	128	0.0%	128	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1,188	53.8%	1,188	53.8%	0.0%
Failure	1,020	46.2%	1,020	46.2%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	931	91.3%	931	91.3%	0.0%
kind 18	2	0.2%	2	0.2%	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.	260	100.0%	260	100.0%	0.0%

LOAD_SUPER_METHOD

specialization stats for LOAD_SUPER_METHOD family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	2	50.0%	2	50.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2	100.0%	2	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
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,552	6.3%	1,552	6.3%	0.0%
hit ⓘ Specialized instructions that complete.	21,310	86.0%	21,310	86.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1,492	77.9%	1,492	77.9%	0.0%
Failure	423	22.1%	423	22.1%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
overriding descriptor	315	74.5%	315	74.5%	0.0%
method	86	20.3%	86	20.3%	0.0%
property	22	5.2%	22	5.2%	0.0%

STORE_SLICE

specialization stats for STORE_SLICE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	258	100.0%	258	100.0%	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.	36	0.0%	36	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	2,125,952	100.0%	2,125,952	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	32	94.1%	32	94.1%	0.0%
Failure	2	5.9%	2	5.9%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
out of range	2	100.0%	2	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.	5,667,555	22.3%	5,667,555	22.3%	0.0%
hit ⓘ Specialized instructions that complete.	19,798,290	77.7%	19,798,290	77.7%	0.0%
miss ⓘ Specialized instructions that deopt.	2,123	0.0%	2,123	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	868	32.5%	868	32.5%	0.0%
Failure	1,801	67.5%	1,801	67.5%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict	1,108	61.5%	1,108	61.5%	0.0%
mapping	566	31.4%	566	31.4%	0.0%
tuple	85	4.7%	85	4.7%	0.0%
sequence	42	2.3%	42	2.3%	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.	438	0.0%	438	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	13,747,883	100.0%	13,747,883	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	184	80.0%	184	80.0%	0.0%
Failure	46	20.0%	46	20.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
iterator	46	100.0%	46	100.0%	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.	221,155,661	28.5%	221,667,771	28.5%	0.2%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	537,619,355	69.2%	537,107,343	69.1%	-0.1%
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	17,945,857	2.3%	17,945,857	2.3%	0.0%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	14,547	0.0%	14,547	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_ATTR	6,394,712	35.7%	6,394,712	35.7%	0.0%
TO_BOOL	5,667,555	31.6%	5,667,555	31.6%	0.0%
FOR_ITER	2,596,181	14.5%	2,596,181	14.5%	0.0%
LOAD_METHOD	2,336,234	13.0%	2,336,234	13.0%	0.0%
COMPARE_OP	709,239	4.0%	709,239	4.0%	0.0%
BINARY_SUBSCR	200,453	1.1%	200,453	1.1%	0.0%
BINARY_OP	8,438	0.0%	8,438	0.0%	0.0%
CONTAINS_OP	3,169	0.0%	3,169	0.0%	0.0%
CALL	1,736	0.0%	1,736	0.0%	0.0%
BINARY_SLICE	1,562	0.0%	1,562	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_SLOT	3,500	23.6%	3,500	23.6%	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	2,385	16.1%	2,385	16.1%	0.0%
TO_BOOL_STR	1,855	12.5%	1,855	12.5%	0.0%
FOR_ITER_LIST	1,601	10.8%	1,601	10.8%	0.0%
CALL_PY_EXACT_ARGS	1,569	10.6%	1,569	10.6%	0.0%
LOAD_GLOBAL_MODULE	962	6.5%	962	6.5%	0.0%
LOAD_GLOBAL_BUILTIN	896	6.0%	896	6.0%	0.0%
FOR_ITER_GEN	895	6.0%	895	6.0%	0.0%
RESUME	299	2.0%	299	2.0%	0.0%
RESUME_CHECK	299	2.0%	299	2.0%	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	10,920,822	18.1%	10,920,822	18.1%	0.0%
Calls to Python functions inlined	49,280,114	81.9%	49,280,114	81.9%	0.0%
Calls via PyEval_EvalFrame (total)	10,920,822	18.1%	10,920,822	18.1%	0.0%
Calls via PyEval_EvalFrame (vector)	2,435,484	4.0%	2,435,484	4.0%	0.0%
Calls via PyEval_EvalFrame (generator)	8,485,338	14.1%	8,485,338	14.1%	0.0%
Calls via PyEval_EvalFrame (legacy)	2,123,195	3.5%	2,123,195	3.5%	0.0%
Calls via PyEval_EvalFrame (function vectorcall)	312,271	0.5%	312,271	0.5%	0.0%
Calls via PyEval_EvalFrame (build class)	18	0.0%	18	0.0%	0.0%
Calls via PyEval_EvalFrame (slot)	417	0.0%	417	0.0%	0.0%
Calls via PyEval_EvalFrame (function ex)	324	0.0%	324	0.0%	0.0%
Calls via PyEval_EvalFrame (api)	972	0.0%	972	0.0%	0.0%
Calls via PyEval_EvalFrame (method)	0	0.0%	0	0.0%
Frame objects created	7,165	0.0%	7,165	0.0%	0.0%
Frames pushed	19,579,986	32.5%	19,579,986	32.5%	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	961		729		-24.1%
Method cache collisions	7,377		6,174		-16.3%
Method cache misses	8,149		7,305		-10.4%
Method cache dunder hits	4,437,132		4,437,364		0.0%
Method cache hits	19,400,204		19,401,048		0.0%
Immortal increfs	60,825,632	8.4%	60,823,758	8.4%	-0.0%
Immortal decrefs	100,581,956	11.9%	100,580,052	11.9%	-0.0%
Frees	23,678,773		23,678,818		0.0%
Mortal increfs	265,923,916	36.8%	265,923,634	36.8%	-0.0%
Mortal decrefs	270,223,882	31.9%	270,223,626	31.9%	-0.0%
Allocations from freelist	33,039,936	61.5%	33,039,936	61.5%	0.0%
Frees to freelist	33,038,390		33,038,390		0.0%
Allocations	20,687,806	38.5%	20,687,806	38.5%	0.0%
Allocations to 512 bytes	20,682,885	38.5%	20,682,885	38.5%	0.0%
Allocations to 4 kbytes	2,402	0.0%	2,402	0.0%	0.0%
Allocations over 4 kbytes	2,519	0.0%	2,519	0.0%	0.0%
Inline values	2,058		2,058		0.0%
Interpreter mortal increfs	349,939,231	48.4%	349,939,231	48.4%	0.0%
Interpreter mortal decrefs	389,078,878	46.0%	389,078,878	46.0%	0.0%
Interpreter immortal increfs	46,123,609	6.4%	46,123,609	6.4%	0.0%
Interpreter immortal decrefs	86,369,626	10.2%	86,369,626	10.2%	0.0%
Materialize dict (on request)	0	0.0%	0	0.0%
Materialize dict (new key)	0	0.0%	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	428	24,943	3,695,704	124,927	737,104	428	24,943	3,695,704	124,927	737,104
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.	2,212		2,212		0.0%
Traces created ⓘ The number of traces that were successfully created.	231	10.4%	231	10.4%	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.	2,114	95.6%	2,114	95.6%	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.	1,981	89.6%	1,981	89.6%	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.	2	0.1%	2	0.1%	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	78,482,000		78,482,000		0.0%
Uops executed ⓘ The total number of uops (micro-operations) that were executed	816,123,111	1,039.9%	816,123,111	1,039.9%	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.	231		231		0.0%
Optimizer successes ⓘ The number of traces that were successfully optimized.	231	100.0%	231	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	97	42.0%	97	42.0%	0.0%
<= 16	61	26.4%	61	26.4%	0.0%
<= 32	44	19.0%	44	19.0%	0.0%
<= 64	2	0.9%	2	0.9%	0.0%
<= 128	25	10.8%	25	10.8%	0.0%
<= 256	1	0.4%	1	0.4%	0.0%
<= 512	1	0.4%	1	0.4%	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	21	9.1%	21	9.1%	0.0%
<= 8	90	39.0%	90	39.0%	0.0%
<= 16	48	20.8%	48	20.8%	0.0%
<= 32	45	19.5%	45	19.5%	0.0%
<= 64	22	9.5%	22	9.5%	0.0%
<= 128	4	1.7%	4	1.7%	0.0%
<= 256	1	0.4%	1	0.4%	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
_MAKE_WARM	78,482,904	78,482,904	0.0%
_START_EXECUTOR	78,482,000	78,482,000	0.0%
_SET_IP	76,057,525	76,057,525	0.0%
_CHECK_PERIODIC	48,862,595	48,862,595	0.0%
_EXIT_TRACE	46,628,717	46,628,717	0.0%
_CHECK_VALIDITY_AND_SET_IP	43,546,481	43,546,481	0.0%
_CHECK_VALIDITY	41,920,079	41,920,079	0.0%
_POP_TOP	41,394,298	41,394,298	0.0%
_PUSH_FRAME	37,099,219	37,099,219	0.0%
_FOR_ITER_GEN_FRAME	31,852,984	31,852,984	0.0%
_DYNAMIC_EXIT	31,852,388	31,852,388	0.0%
_TIER2_RESUME_CHECK	31,816,929	31,816,929	0.0%
_LOAD_FAST	23,706,956	23,706,956	0.0%
_STORE_FAST	16,682,720	16,682,720	0.0%
_GUARD_IS_FALSE_POP	10,401,152	10,401,152	0.0%
_PUSH_NULL	9,722,354	9,722,354	0.0%
_LOAD_CONST_INLINE	8,748,483	8,748,483	0.0%
_LOAD_FAST_1	8,466,943	8,466,943	0.0%
_GUARD_NOT_EXHAUSTED_LIST	8,411,171	8,411,171	0.0%
_ITER_CHECK_LIST	8,411,171	8,411,171	0.0%
_LOAD_CONST_INLINE_BORROW	8,344,123	8,344,123	0.0%
_CHECK_FUNCTION	8,238,698	8,238,698	0.0%
_IS_OP	6,941,725	6,941,725	0.0%
_LOAD_FAST_3	6,762,025	6,762,025	0.0%
_LOAD_FAST_2	6,507,998	6,507,998	0.0%
_ITER_NEXT_LIST	6,290,822	6,290,822	0.0%
_LOAD_FAST_0	5,313,821	5,313,821	0.0%
_RESUME_CHECK	5,247,650	5,247,650	0.0%
_SAVE_RETURN_OFFSET	5,246,831	5,246,831	0.0%
_GUARD_IS_TRUE_POP	5,117,097	5,117,097	0.0%
_FOR_ITER_TIER_TWO	4,617,958	4,617,958	0.0%
_LOAD_FAST_7	4,480,341	4,480,341	0.0%
_LOAD_METHOD	4,036,158	4,036,158	0.0%
_RETURN_VALUE	3,847,998	3,847,998	0.0%
_TO_BOOL_LIST	3,325,353	3,325,353	0.0%
_GET_ITER	2,723,509	2,723,509	0.0%
_CALL_BUILTIN_O	2,684,978	2,684,978	0.0%
_CALL_TYPE_1	2,683,118	2,683,118	0.0%
_CHECK_FUNCTION_VERSION	2,558,799	2,558,799	0.0%
_PY_FRAME_GENERAL	2,557,161	2,557,161	0.0%
_CALL_NON_PY_GENERAL	2,179,968	2,179,968	0.0%
_CHECK_IS_NOT_PY_CALLABLE	2,179,968	2,179,968	0.0%
_UNPACK_SEQUENCE_TUPLE	2,168,066	2,168,066	0.0%
_CHECK_FUNCTION_VERSION_INLINE	1,923,999	1,923,999	0.0%
_LOAD_FAST_4	1,923,999	1,923,999	0.0%
_COPY_FREE_VARS	1,923,180	1,923,180	0.0%
_STORE_SUBSCR_DICT	1,923,180	1,923,180	0.0%
_CHECK_STACK_SPACE_OPERAND	1,923,180	1,923,180	0.0%
_INIT_CALL_PY_EXACT_ARGS_4	1,923,180	1,923,180	0.0%
_LOAD_FAST_6	1,923,180	1,923,180	0.0%
_TO_BOOL	1,330,690	1,330,690	0.0%
_TO_BOOL_INT	1,330,539	1,330,539	0.0%
_TO_BOOL_BOOL	897,416	897,416	0.0%
_GUARD_TYPE_VERSION	839,046	839,046	0.0%
_LOAD_METHOD_NO_DICT	838,227	838,227	0.0%
_CALL_BUILTIN_FAST	831,842	831,842	0.0%
_LOAD_SMALL_INT_1	764,937	764,937	0.0%
_TO_BOOL_STR	764,033	764,033	0.0%
_CALL_LEN	764,033	764,033	0.0%
_CHECK_METHOD_VERSION_KW	764,033	764,033	0.0%
_COMPARE_OP_INT	764,033	764,033	0.0%
_EXPAND_METHOD_KW	764,033	764,033	0.0%
_GUARD_NOS_INT	764,033	764,033	0.0%
_PY_FRAME_KW	764,033	764,033	0.0%
_BUILD_TUPLE	696,558	696,558	0.0%
_GUARD_NOT_EXHAUSTED_TUPLE	633,981	633,981	0.0%
_CONTAINS_OP_SET	633,981	633,981	0.0%
_UNPACK_SEQUENCE_TWO_TUPLE	633,981	633,981	0.0%
_ITER_CHECK_TUPLE	633,981	633,981	0.0%
_CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	203,427	203,427	0.0%
_STORE_FAST_3	168,706	168,706	0.0%
_CONTAINS_OP_DICT	167,068	167,068	0.0%
_STORE_FAST_1	68,628	68,628	0.0%
_LOAD_SMALL_INT	6,328	6,328	0.0%
_BUILD_MAP	2,457	2,457	0.0%
_LOAD_ATTR	2,457	2,457	0.0%
_LOAD_ATTR_SLOT	2,457	2,457	0.0%
_CHECK_FUNCTION_EXACT_ARGS	1,638	1,638	0.0%
_INIT_CALL_PY_EXACT_ARGS_1	1,638	1,638	0.0%
_LOAD_FAST_5	1,638	1,638	0.0%
_GUARD_NOT_EXHAUSTED_RANGE	905	905	0.0%
_ITER_CHECK_RANGE	905	905	0.0%
_LIST_APPEND	904	904	0.0%
_CALL_KW_NON_PY	904	904	0.0%
_CHECK_IS_NOT_PY_CALLABLE_KW	904	904	0.0%
_ITER_NEXT_RANGE	904	904	0.0%
_JUMP_TO_TOP	904	904	0.0%
_LOAD_SMALL_INT_2	904	904	0.0%
_LOAD_SMALL_INT_3	904	904	0.0%
_STORE_FAST_4	904	904	0.0%
_DEOPT	895	895	0.0%
_CALL_BUILTIN_CLASS	819	819	0.0%
_CALL_BUILTIN_FAST_WITH_KEYWORDS	819	819	0.0%
_CHECK_CALL_BOUND_METHOD_EXACT_ARGS	819	819	0.0%
_GUARD_IS_NOT_NONE_POP	819	819	0.0%
_INIT_CALL_BOUND_METHOD_EXACT_ARGS	819	819	0.0%
_INIT_CALL_PY_EXACT_ARGS_3	819	819	0.0%
_STORE_FAST_2	819	819	0.0%
_STORE_FAST_5	819	819	0.0%
_STORE_FAST_6	819	819	0.0%
_STORE_FAST_7	819	819	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	1	1	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	42	42	0.0%

---

Stats gathered on: 2025-01-22