bm-20250121-azure-x86_64-brandtbucher-remove_optimizer_api-3.14.0a4+-085e172-pystats-coverage-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	295,137	120	-100.0%
POP_JUMP_IF_TRUE	24,357	24,369	0.0%
CALL_METHOD_DESCRIPTOR_FAST	28,017	28,029	0.0%
FOR_ITER_LIST	41,577	41,589	0.0%
LOAD_METHOD_NO_DICT	53,877	53,889	0.0%
TO_BOOL_BOOL	64,957	64,969	0.0%
STORE_FAST	150,837	150,849	0.0%
LOAD_FAST	73,491,594	73,491,618	0.0%
LOAD_SMALL_INT	58,294,440	58,294,440	0.0%
INSTRUMENTED_LINE	58,270,440	58,270,440	0.0%
POP_JUMP_IF_FALSE	29,510,820	29,510,820	0.0%
PUSH_NULL	29,276,040	29,276,040	0.0%
CALL_PY_EXACT_ARGS	29,195,940	29,195,940	0.0%
BINARY_OP_SUBTRACT_INT	29,147,340	29,147,340	0.0%
COMPARE_OP_INT	29,140,140	29,140,140	0.0%
INSTRUMENTED_RESUME	29,134,740	29,134,740	0.0%
INSTRUMENTED_RETURN_VALUE	29,134,440	29,134,440	0.0%
LOAD_GLOBAL_MODULE	14,686,020	14,686,020	0.0%
LOAD_GLOBAL	14,570,000	14,570,000	0.0%
BINARY_OP_ADD_INT	14,569,380	14,569,380	0.0%
LOAD_FAST_LOAD_FAST	565,080	565,080	0.0%
STORE_FAST_STORE_FAST	253,440	253,440	0.0%
FOR_ITER	252,740	252,740	0.0%
UNPACK_SEQUENCE_TWO_TUPLE	250,080	250,080	0.0%
STORE_SUBSCR_DICT	249,660	249,660	0.0%
CONTAINS_OP	249,460	249,460	0.0%
RESUME_CHECK	86,120	86,120	0.0%
RETURN_VALUE	72,780	72,780	0.0%
LOAD_GLOBAL_BUILTIN	72,000	72,000	0.0%
LOAD_CONST_IMMORTAL	49,020	49,020	0.0%
LOAD_ATTR	43,720	43,720	0.0%
LOAD_ATTR_MODULE	41,880	41,880	0.0%
CALL_ISINSTANCE	28,980	28,980	0.0%
COMPARE_OP_STR	25,260	25,260	0.0%
CALL_NON_PY_GENERAL	24,840	24,840	0.0%
POP_TOP	24,480	24,480	0.0%
LOAD_CONST_MORTAL	22,980	22,980	0.0%
NOP	20,340	20,340	0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	19,920	19,920	0.0%
TO_BOOL_NONE	19,280	19,280	0.0%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	18,540	18,540	0.0%
LOAD_DEREF	18,180	18,180	0.0%
INTERPRETER_EXIT	17,340	17,340	0.0%
EXTENDED_ARG	15,960	15,960	0.0%
BINARY_OP_ADD_UNICODE	14,820	14,820	0.0%
LOAD_ATTR_INSTANCE_VALUE	14,520	14,520	0.0%
LOAD_METHOD	13,400	13,400	0.0%
GET_ITER	13,320	13,320	0.0%
STORE_ATTR	12,900	12,900	0.0%
POP_JUMP_IF_NOT_NONE	12,780	12,780	0.0%
LOAD_ATTR_SLOT	12,360	12,360	0.0%
STORE_ATTR_INSTANCE_VALUE	12,060	12,060	0.0%
CALL_BUILTIN_O	11,820	11,820	0.0%
TO_BOOL_STR	11,640	11,640	0.0%
BUILD_TUPLE	10,920	10,920	0.0%
TO_BOOL_INT	8,580	8,580	0.0%
POP_ITER	8,460	8,460	0.0%
YIELD_VALUE	8,460	8,460	0.0%
CALL_BUILTIN_FAST	8,280	8,280	0.0%
CALL_BUILTIN_CLASS	6,960	6,960	0.0%
SWAP	6,660	6,660	0.0%
COPY_FREE_VARS	6,480	6,480	0.0%
LIST_APPEND	6,420	6,420	0.0%
BINARY_SUBSCR_DICT	6,420	6,420	0.0%
BINARY_SUBSCR	6,060	6,060	0.0%
BUILD_LIST	6,000	6,000	0.0%
BUILD_MAP	5,580	5,580	0.0%
STORE_FAST_LOAD_FAST	5,580	5,580	0.0%
MAKE_FUNCTION	5,520	5,520	0.0%
TO_BOOL	5,420	5,420	0.0%
JUMP_FORWARD	5,340	5,340	0.0%
CALL_LEN	5,280	5,280	0.0%
BINARY_OP	4,740	4,740	0.0%
SET_FUNCTION_ATTRIBUTE	4,560	4,560	0.0%
CALL_FUNCTION_EX	4,260	4,260	0.0%
CONTAINS_OP_DICT	4,260	4,260	0.0%
RETURN_GENERATOR	3,900	3,900	0.0%
CHECK_EXC_MATCH	3,780	3,780	0.0%
POP_EXCEPT	3,780	3,780	0.0%
PUSH_EXC_INFO	3,780	3,780	0.0%
LOAD_METHOD_WITH_VALUES	3,700	3,700	0.0%
STORE_ATTR_SLOT	3,420	3,420	0.0%
CALL_PY_GENERAL	3,360	3,360	0.0%
CALL	3,240	3,240	0.0%
BINARY_SLICE	2,940	2,940	0.0%
CALL_KW_NON_PY	2,820	2,820	0.0%
COPY	2,520	2,520	0.0%
RESUME	2,460	2,460	0.0%
DICT_MERGE	2,280	2,280	0.0%
BINARY_SUBSCR_TUPLE_INT	2,280	2,280	0.0%
LOAD_SUPER_METHOD_METHOD	2,160	2,160	0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	2,100	2,100	0.0%
TO_BOOL_LIST	2,040	2,040	0.0%
MAKE_CELL	1,980	1,980	0.0%
STORE_DEREF	1,860	1,860	0.0%
CALL_METHOD_DESCRIPTOR_NOARGS	1,860	1,860	0.0%
POP_JUMP_IF_NONE	1,680	1,680	0.0%
CALL_METHOD_DESCRIPTOR_O	1,440	1,440	0.0%
CALL_LIST_APPEND	1,380	1,380	0.0%
TO_BOOL_ALWAYS_TRUE	1,280	1,280	0.0%
FOR_ITER_TUPLE	1,260	1,260	0.0%
LOAD_ATTR_WITH_HINT	1,260	1,260	0.0%
UNPACK_SEQUENCE_TUPLE	1,140	1,140	0.0%
FORMAT_SIMPLE	1,020	1,020	0.0%
CALL_INTRINSIC_1	1,020	1,020	0.0%
LIST_EXTEND	1,020	1,020	0.0%
LOAD_FAST_AND_CLEAR	1,020	1,020	0.0%
CALL_KW_PY	1,020	1,020	0.0%
IMPORT_NAME	960	960	0.0%
MAP_ADD	960	960	0.0%
UNPACK_EX	900	900	0.0%
BINARY_SUBSCR_LIST_INT	900	900	0.0%
COMPARE_OP_FLOAT	900	900	0.0%
IS_OP	840	840	0.0%
BUILD_STRING	780	780	0.0%
EXIT_INIT_CHECK	600	600	0.0%
CALL_ALLOC_AND_ENTER_INIT	600	600	0.0%
CALL_TUPLE_1	600	600	0.0%
CALL_TYPE_1	540	540	0.0%
STORE_ATTR_WITH_HINT	480	480	0.0%
CONVERT_VALUE	420	420	0.0%
DELETE_ATTR	360	360	0.0%
LOAD_SPECIAL	360	360	0.0%
COMPARE_OP	340	340	0.0%
UNARY_NEGATIVE	300	300	0.0%
LOAD_CONST	300	300	0.0%
STORE_GLOBAL	240	240	0.0%
CONTAINS_OP_SET	240	240	0.0%
RAISE_VARARGS	180	180	0.0%
RERAISE	180	180	0.0%
BINARY_SUBSCR_GETITEM	180	180	0.0%
BINARY_SUBSCR_STR_INT	180	180	0.0%
LOAD_ATTR_PROPERTY	180	180	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	120	120	0.0%
CALL_KW	120	120	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	120	120	0.0%
LOAD_ATTR_CLASS	120	120	0.0%
INSTRUMENTED_JUMP_BACKWARD	120	120	0.0%
BUILD_SLICE	60	60	0.0%
BINARY_OP_SUBTRACT_FLOAT	60	60	0.0%
CALL_KW_BOUND_METHOD	60	60	0.0%
LOAD_ATTR_CLASS_WITH_METACLASS_CHECK	60	60	0.0%
UNPACK_SEQUENCE	40	40	0.0%
JUMP_BACKWARD_JIT		295,089
JUMP_BACKWARD_NO_JIT		60

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.	4,380	0.0%	4,380	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	43,731,720	100.0%	43,731,720	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	40	11.1%	40	11.1%	0.0%
Failure	320	88.9%	320	88.9%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
add other	80	25.0%	80	25.0%	0.0%
floor divide	80	25.0%	80	25.0%	0.0%
add different types	40	12.5%	40	12.5%	0.0%
multiply different types	40	12.5%	40	12.5%	0.0%
subtract other	40	12.5%	40	12.5%	0.0%
and other	20	6.2%	20	6.2%	0.0%
remainder	20	6.2%	20	6.2%	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.	2,940	100.0%	2,940	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.	5,760	36.0%	5,760	36.0%	0.0%
hit ⓘ Specialized instructions that complete.	9,960	62.2%	9,960	62.2%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	20	6.7%	20	6.7%	0.0%
Failure	280	93.3%	280	93.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
list slice	140	50.0%	140	50.0%	0.0%
out of range	60	21.4%	60	21.4%	0.0%
buffer int	60	21.4%	60	21.4%	0.0%
string slice	20	7.1%	20	7.1%	0.0%

CALL

specialization stats for CALL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	29,313,957	100.0%	29,313,969	100.0%	0.0%
miss ⓘ Specialized instructions that deopt.	60	0.0%	60	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,240	100.0%	3,240	100.0%	0.0%
Failure	0	0.0%	0	0.0%

CALL_KW

specialization stats for CALL_KW family

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	120	100.0%	120	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.	240	0.0%	240	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	29,166,300	100.0%	29,166,300	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	40	40.0%	40	40.0%	0.0%
Failure	60	60.0%	60	60.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
tuple	40	66.7%	40	66.7%	0.0%
different types	20	33.3%	20	33.3%	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.	249,180	98.1%	249,180	98.1%	0.0%
hit ⓘ Specialized instructions that complete.	4,500	1.8%	4,500	1.8%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	80	28.6%	80	28.6%	0.0%
Failure	200	71.4%	200	71.4%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
list	80	40.0%	80	40.0%	0.0%
other	60	30.0%	60	30.0%	0.0%
tuple	60	30.0%	60	30.0%	0.0%

FOR_ITER

specialization stats for FOR_ITER family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	42,837	14.5%	42,849	14.5%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	252,240	85.3%	252,240	85.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	140	28.0%	140	28.0%	0.0%
Failure	360	72.0%	360	72.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict items	160	44.4%	160	44.4%	0.0%
set	80	22.2%	80	22.2%	0.0%
dict values	80	22.2%	80	22.2%	0.0%
dict keys	40	11.1%	40	11.1%	0.0%

LOAD_ATTR

specialization stats for LOAD_ATTR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	145,357	76.6%	145,369	76.6%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	38,880	20.5%	38,880	20.5%	0.0%
miss ⓘ Specialized instructions that deopt.	600	0.3%	600	0.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	3,520	76.5%	3,520	76.5%	0.0%
Failure	1,080	23.5%	1,080	23.5%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
overriding descriptor	380	35.2%	380	35.2%	0.0%
method	300	27.8%	300	27.8%	0.0%
module attr not found	300	27.8%	300	27.8%	0.0%
non object slot	40	3.7%	40	3.7%	0.0%
not in dict	40	3.7%	40	3.7%	0.0%
class method obj	20	1.9%	20	1.9%	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.	14,567,820	49.7%	14,567,820	49.7%	0.0%
deopt ⓘ Specialized instructions that deopt.	180	0.0%	180	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	14,757,840	50.3%	14,757,840	50.3%	0.0%
miss ⓘ Specialized instructions that deopt.	180	0.0%	180	0.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,180	100.0%	2,180	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.	11,240	80.6%	11,240	80.6%	0.0%
miss ⓘ Specialized instructions that deopt.	540	3.9%	540	3.9%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1,240	57.4%	1,240	57.4%	0.0%
Failure	920	42.6%	920	42.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	900	97.8%	900	97.8%	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.	2,160	100.0%	2,160	100.0%	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.	8,880	30.8%	8,880	30.8%	0.0%
hit ⓘ Specialized instructions that complete.	15,960	55.3%	15,960	55.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	2,640	65.7%	2,640	65.7%	0.0%
Failure	1,380	34.3%	1,380	34.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
not in dict	1,220	88.4%	1,220	88.4%	0.0%
no dict	80	5.8%	80	5.8%	0.0%
split dict	40	2.9%	40	2.9%	0.0%
not in keys	20	1.4%	20	1.4%	0.0%
class attr simple	20	1.4%	20	1.4%	0.0%

STORE_SUBSCR

specialization stats for STORE_SUBSCR family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	257,100	100.0%	257,100	100.0%	0.0%

TO_BOOL

specialization stats for TO_BOOL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	105,257	93.2%	105,269	93.2%	0.0%
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	3,560	3.2%	3,560	3.2%	0.0%
miss ⓘ Specialized instructions that deopt.	2,300	2.0%	2,300	2.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	1,520	80.0%	1,520	80.0%	0.0%
Failure	380	20.0%	380	20.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	120	31.6%	120	31.6%	0.0%
tuple	120	31.6%	120	31.6%	0.0%
dict	60	15.8%	60	15.8%	0.0%
set	60	15.8%	60	15.8%	0.0%
sequence	20	5.3%	20	5.3%	0.0%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
hit ⓘ Specialized instructions that complete.	258,660	100.0%	258,660	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	40	100.0%	40	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.	117,975,508	26.7%	118,270,705	26.8%	0.3%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	308,720,445	69.9%	308,425,476	69.8%	-0.1%
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	15,165,120	3.4%	15,165,120	3.4%	0.0%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	15,160	0.0%	15,160	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_GLOBAL	14,567,820	96.2%	14,567,820	96.2%	0.0%
FOR_ITER	252,240	1.7%	252,240	1.7%	0.0%
CONTAINS_OP	249,180	1.6%	249,180	1.6%	0.0%
LOAD_ATTR	38,880	0.3%	38,880	0.3%	0.0%
LOAD_METHOD	11,240	0.1%	11,240	0.1%	0.0%
STORE_ATTR	8,880	0.1%	8,880	0.1%	0.0%
BINARY_SUBSCR	5,760	0.0%	5,760	0.0%	0.0%
BINARY_OP	4,380	0.0%	4,380	0.0%	0.0%
TO_BOOL	3,560	0.0%	3,560	0.0%	0.0%
BINARY_SLICE	2,940	0.0%	2,940	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
RESUME	11,480	43.1%	11,480	43.1%	0.0%
RESUME_CHECK	11,480	43.1%	11,480	43.1%	0.0%
TO_BOOL_NONE	1,240	4.7%	1,240	4.7%	0.0%
TO_BOOL_ALWAYS_TRUE	1,060	4.0%	1,060	4.0%	0.0%
LOAD_ATTR_MODULE	600	2.3%	600	2.3%	0.0%
LOAD_METHOD_WITH_VALUES	540	2.0%	540	2.0%	0.0%
LOAD_GLOBAL_BUILTIN	180	0.7%	180	0.7%	0.0%
CALL_PY_GENERAL	60	0.2%	60	0.2%	0.0%
CACHE	0	0.0%	0	0.0%
BINARY_OP_INPLACE_ADD_UNICODE	0	0.0%	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	17,400	0.1%	17,400	0.1%	0.0%
Calls to Python functions inlined	29,201,760	99.9%	29,201,760	99.9%	0.0%
Calls via PyEval_EvalFrame (total)	17,400	0.1%	17,400	0.1%	0.0%
Calls via PyEval_EvalFrame (vector)	5,040	0.0%	5,040	0.0%	0.0%
Calls via PyEval_EvalFrame (generator)	12,360	0.0%	12,360	0.0%	0.0%
Calls via PyEval_EvalFrame (legacy)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (function vectorcall)	5,040	0.0%	5,040	0.0%	0.0%
Calls via PyEval_EvalFrame (build class)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (slot)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (function ex)	300	0.0%	300	0.0%	0.0%
Calls via PyEval_EvalFrame (api)	960	0.0%	960	0.0%	0.0%
Calls via PyEval_EvalFrame (method)	0	0.0%	0	0.0%
Frame objects created	29,138,780	99.7%	29,138,780	99.7%	0.0%
Frames pushed	29,207,400	100.0%	29,207,400	100.0%	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 misses	2,760		2,658		-3.7%
Method cache collisions	2,987		2,906		-2.7%
Method cache dunder misses	504		505		0.2%
Interpreter mortal increfs	45,161,008	6.8%	45,158,896	6.8%	-0.0%
Interpreter immortal increfs	74,231,580	11.2%	74,233,740	11.2%	0.0%
Method cache dunder hits	41,716		41,715		-0.0%
Frees	58,547,257		58,546,031		-0.0%
Mortal decrefs	205,484,216	26.8%	205,479,989	26.8%	-0.0%
Allocations to 512 bytes	58,527,520	99.2%	58,526,320	99.2%	-0.0%
Allocations	58,532,800	99.2%	58,531,600	99.2%	-0.0%
Interpreter mortal decrefs	89,257,408	11.6%	89,256,016	11.6%	-0.0%
Interpreter immortal decrefs	175,795,000	22.9%	175,796,440	22.9%	0.0%
Mortal increfs	307,172,192	46.2%	307,169,904	46.2%	-0.0%
Immortal decrefs	296,857,186	38.7%	296,859,169	38.7%	0.0%
Method cache hits	29,211,120		29,211,222		0.0%
Immortal increfs	238,003,236	35.8%	238,002,765	35.8%	-0.0%
Allocations from freelist	492,080	0.8%	492,080	0.8%	0.0%
Frees to freelist	489,360		489,360		0.0%
Allocations to 4 kbytes	2,460	0.0%	2,460	0.0%	0.0%
Allocations over 4 kbytes	2,820	0.0%	2,820	0.0%	0.0%
Inline values	1,800		1,800		0.0%
Materialize dict (on request)	180	10.0%	180	10.0%	0.0%
Materialize dict (new key)	180	10.0%	180	10.0%	0.0%
Materialize dict (too big)	120	6.7%	120	6.7%	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	0	0	0	0	0	0	0	0	0	0
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.	60		60		0.0%
Traces created ⓘ The number of traces that were successfully created.	60	100.0%	60	100.0%	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.	0	0.0%	0	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.	0	0.0%	0	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.	60	100.0%	60	100.0%	0.0%
Traces executed ⓘ The number of traces that were executed	60		60		0.0%
Uops executed ⓘ The total number of uops (micro-operations) that were executed	171,540	285,900.0%	171,540	285,900.0%	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.	60		60		0.0%
Optimizer successes ⓘ The number of traces that were successfully optimized.	60	100.0%	60	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	0	0.0%	0	0.0%
<= 16	0	0.0%	0	0.0%
<= 32	60	100.0%	60	100.0%	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	0	0.0%	0	0.0%
<= 16	0	0.0%	0	0.0%
<= 32	60	100.0%	60	100.0%	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	29,820	29,820	0.0%
_CHECK_VALIDITY	22,320	22,320	0.0%
_LOAD_FAST_3	14,880	14,880	0.0%
_FOR_ITER_TIER_TWO	7,500	7,500	0.0%
_CHECK_PERIODIC	7,500	7,500	0.0%
_CHECK_VALIDITY_AND_SET_IP	7,500	7,500	0.0%
_MAKE_WARM	7,500	7,500	0.0%
_STORE_SUBSCR_DICT	7,440	7,440	0.0%
_UNPACK_SEQUENCE_TWO_TUPLE	7,440	7,440	0.0%
_CONTAINS_OP	7,440	7,440	0.0%
_GUARD_IS_FALSE_POP	7,440	7,440	0.0%
_JUMP_TO_TOP	7,440	7,440	0.0%
_LOAD_FAST_0	7,440	7,440	0.0%
_LOAD_FAST_2	7,440	7,440	0.0%
_LOAD_FAST_4	7,440	7,440	0.0%
_STORE_FAST_3	7,440	7,440	0.0%
_STORE_FAST_4	7,440	7,440	0.0%
_EXIT_TRACE	60	60	0.0%
_START_EXECUTOR	60	60	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

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	20	20	0.0%

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Stats gathered on: 2025-01-22