bm-20250416-azure-x86_64-faster%2dcpython-get_iter_stats-3.14.0a7+-10cd875-pystats-async_tree_cpu_io_mixed-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
LOAD_FAST_BORROW	345,247,240	345,247,240	0.0%
POP_JUMP_IF_FALSE	108,484,540	108,484,540	0.0%
RETURN_VALUE	91,576,080	91,576,080	0.0%
LOAD_CONST_IMMORTAL	88,493,720	88,493,720	0.0%
RESUME_CHECK	85,279,440	85,279,440	0.0%
STORE_FAST	80,217,820	80,217,820	0.0%
LOAD_FAST_BORROW_LOAD_FAST_BORROW	80,059,300	80,059,300	0.0%
TO_BOOL_BOOL	72,242,580	72,242,580	0.0%
LOAD_ATTR_METHOD_WITH_VALUES	67,180,900	67,180,900	0.0%
LOAD_ATTR_SLOT	60,354,920	60,354,920	0.0%
LOAD_ATTR_INSTANCE_VALUE	58,678,380	58,678,380	0.0%
POP_TOP	57,126,800	57,126,800	0.0%
STORE_ATTR_SLOT	53,936,940	53,936,940	0.0%
LOAD_GLOBAL_MODULE	52,232,740	52,232,740	0.0%
CALL_PY_EXACT_ARGS	50,271,460	50,271,460	0.0%
PUSH_NULL	48,021,840	48,021,840	0.0%
LOAD_ATTR_METHOD_NO_DICT	32,203,180	32,203,180	0.0%
LOAD_ATTR_MODULE	31,642,340	31,642,340	0.0%
LOAD_DEREF	30,514,360	30,514,360	0.0%
CALL_METHOD_DESCRIPTOR_NOARGS	25,963,080	25,963,080	0.0%
INTERPRETER_EXIT	21,283,160	21,283,160	0.0%
LOAD_SMALL_INT	19,047,760	19,047,760	0.0%
TO_BOOL_NONE	18,618,820	18,618,820	0.0%
POP_JUMP_IF_NOT_NONE	18,480,200	18,480,200	0.0%
JUMP_BACKWARD_NO_JIT	18,175,120	18,175,120	0.0%
POP_JUMP_IF_NONE	17,356,320	17,356,320	0.0%
CALL_NON_PY_GENERAL	14,562,260	14,562,260	0.0%
NOP	14,422,440	14,422,440	0.0%
LOAD_ATTR	11,766,940	11,766,940	0.0%
CALL_FUNCTION_EX	11,619,360	11,619,360	0.0%
FOR_ITER_RANGE	11,479,900	11,479,900	0.0%
COMPARE_OP_INT	11,322,580	11,322,580	0.0%
CALL_BUILTIN_FAST	10,218,320	10,218,320	0.0%
BUILD_LIST	9,940,980	9,940,980	0.0%
LOAD_GLOBAL_BUILTIN	9,671,180	9,671,180	0.0%
BINARY_OP_ADD_INT	9,521,620	9,521,620	0.0%
STORE_DEREF	9,517,680	9,517,680	0.0%
CALL_METHOD_DESCRIPTOR_O	9,392,040	9,392,040	0.0%
RETURN_GENERATOR	7,841,520	7,841,520	0.0%
CALL_INTRINSIC_1	7,700,100	7,700,100	0.0%
LIST_EXTEND	7,700,100	7,700,100	0.0%
POP_JUMP_IF_TRUE	7,564,300	7,564,300	0.0%
EXIT_INIT_CHECK	7,559,680	7,559,680	0.0%
CALL_ALLOC_AND_ENTER_INIT	7,559,680	7,559,680	0.0%
CALL_LIST_APPEND	6,718,320	6,718,320	0.0%
END_SEND	5,182,760	5,182,760	0.0%
GET_AWAITABLE	5,182,760	5,182,760	0.0%
LOAD_CONST_MORTAL	5,179,880	5,179,880	0.0%
SEND_GEN	5,044,820	5,044,820	0.0%
BINARY_OP_SUBTRACT_INT	4,760,840	4,760,840	0.0%
COMPARE_OP_FLOAT	4,484,280	4,484,280	0.0%
CALL_BUILTIN_O	4,482,300	4,482,300	0.0%
FOR_ITER_LIST	4,481,700	4,481,700	0.0%
BUILD_TUPLE	4,479,540	4,479,540	0.0%
COPY_FREE_VARS	4,200,880	4,200,880	0.0%
BUILD_MAP	4,059,980	4,059,980	0.0%
JUMP_FORWARD	3,922,260	3,922,260	0.0%
FOR_ITER_TUPLE	3,919,020	3,919,020	0.0%
CALL_PY_GENERAL	3,640,900	3,640,900	0.0%
STORE_ATTR	3,361,100	3,361,100	0.0%
COPY	3,361,080	3,361,080	0.0%
IS_OP	3,359,520	3,359,520	0.0%
DICT_MERGE	3,359,280	3,359,280	0.0%
DELETE_FAST	3,359,220	3,359,220	0.0%
CALL_KW_PY	3,359,220	3,359,220	0.0%
CALL_TYPE_1	3,359,220	3,359,220	0.0%
CONTAINS_OP_DICT	3,359,220	3,359,220	0.0%
CONTAINS_OP_SET	3,359,220	3,359,220	0.0%
STORE_SUBSCR_DICT	3,359,220	3,359,220	0.0%
LIST_APPEND	3,359,160	3,359,160	0.0%
GET_ITER	2,803,620	2,803,620	0.0%
MAKE_CELL	2,799,420	2,799,420	0.0%
POP_ITER	2,243,820	2,243,820	0.0%
SWAP	1,679,820	1,679,820	0.0%
CALL_ISINSTANCE	1,544,560	1,544,560	0.0%
LOAD_ATTR_CLASS	1,401,860	1,401,860	0.0%
CALL_BOUND_METHOD_EXACT_ARGS	1,401,680	1,401,680	0.0%
SEND	1,401,260	1,401,260	0.0%
JUMP_BACKWARD_NO_INTERRUPT	1,262,980	1,262,980	0.0%
YIELD_VALUE	1,262,980	1,262,980	0.0%
CALL_METHOD_DESCRIPTOR_FAST	1,261,200	1,261,200	0.0%
CALL_KW_NON_PY	1,260,380	1,260,380	0.0%
STORE_ATTR_INSTANCE_VALUE	1,122,660	1,122,660	0.0%
SET_FUNCTION_ATTRIBUTE	1,119,960	1,119,960	0.0%
LOAD_SUPER_ATTR_METHOD	841,540	841,540	0.0%
TO_BOOL	562,080	562,080	0.0%
CALL_BUILTIN_CLASS	561,780	561,780	0.0%
MAKE_FUNCTION	560,100	560,100	0.0%
CALL_BUILTIN_FAST_WITH_KEYWORDS	559,980	559,980	0.0%
LOAD_FAST_AND_CLEAR	559,860	559,860	0.0%
TO_BOOL_LIST	143,360	143,360	0.0%
BINARY_OP_ADD_FLOAT	141,980	141,980	0.0%
COMPARE_OP	140,800	140,800	0.0%
BINARY_OP_SUBSCR_LIST_INT	140,780	140,780	0.0%
LOAD_FAST	4,860	4,860	0.0%
CALL_LEN	4,140	4,140	0.0%
CALL	2,400	2,400	0.0%
TO_BOOL_INT	1,740	1,740	0.0%
CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS	1,560	1,560	0.0%
LOAD_GLOBAL	1,320	1,320	0.0%
BINARY_OP	360	360	0.0%
BINARY_OP_EXTEND	360	360	0.0%
FOR_ITER	240	240	0.0%
UNPACK_SEQUENCE_TWO_TUPLE	240	240	0.0%
STORE_FAST_STORE_FAST	180	180	0.0%
LOAD_SUPER_ATTR	160	160	0.0%
CHECK_EXC_MATCH	120	120	0.0%
POP_EXCEPT	120	120	0.0%
PUSH_EXC_INFO	120	120	0.0%
UNARY_INVERT	120	120	0.0%
UNARY_NOT	120	120	0.0%
BINARY_OP_SUBSCR_DICT	120	120	0.0%
UNPACK_SEQUENCE	80	80	0.0%
IMPORT_NAME	60	60	0.0%
LOAD_FAST_LOAD_FAST	60	60	0.0%
RAISE_VARARGS	60	60	0.0%
RERAISE	60	60	0.0%
BINARY_OP_SUBSCR_GETITEM	60	60	0.0%
BINARY_OP_SUBSCR_TUPLE_INT	60	60	0.0%
BINARY_OP_SUBTRACT_FLOAT	60	60	0.0%
CALL_BOUND_METHOD_GENERAL	60	60	0.0%
LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES	60	60	0.0%
CALL_KW	40	40	0.0%
STORE_SUBSCR	20	20	0.0%
CONTAINS_OP	20	20	0.0%

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.	120	0.0%	120	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	14,706,660	100.0%	14,706,660	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	220	91.7%	220	91.7%	0.0%
Failure	20	8.3%	20	8.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
true divide other	20	100.0%	20	100.0%	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.	5,157,300	4.1%	5,157,300	4.1%	0.0%
hit ⓘ Specialized instructions that complete.	119,444,520	95.8%	119,444,520	95.8%	0.0%
miss ⓘ Specialized instructions that deopt.	5,256,480	4.2%	5,256,480	4.2%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	101,580	100.0%	101,580	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	20	20 / 0 !!	20	20 / 0 !!	0.0%

CALL_KW

specialization stats for CALL_KW family

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%

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.	140,720	0.9%	140,720	0.9%	0.0%
hit ⓘ Specialized instructions that complete.	15,806,860	99.1%	15,806,860	99.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	20	25.0%	20	25.0%	0.0%
Failure	60	75.0%	60	75.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
float long	40	66.7%	40	66.7%	0.0%
bool	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
hit ⓘ Specialized instructions that complete.	6,718,440	100.0%	6,718,440	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	20	100.0%	20	100.0%	0.0%
Failure	0	0.0%	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.	180	0.0%	180	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	19,880,620	100.0%	19,880,620	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	20	33.3%	20	33.3%	0.0%
Failure	40	66.7%	40	66.7%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
dict items	40	100.0%	40	100.0%	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.	11,760,980	4.5%	11,760,980	4.5%	0.0%
hit ⓘ Specialized instructions that complete.	251,131,220	95.4%	251,131,220	95.4%	0.0%
miss ⓘ Specialized instructions that deopt.	330,420	0.1%	330,420	0.1%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	8,900	73.1%	8,900	73.1%	0.0%
Failure	3,280	26.9%	3,280	26.9%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
method	2,020	61.6%	2,020	61.6%	0.0%
overriding descriptor	940	28.7%	940	28.7%	0.0%
module attr not found	240	7.3%	240	7.3%	0.0%
metaclass attribute	20	0.6%	20	0.6%	0.0%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deopt ⓘ Specialized instructions that deopt.	60	0.0%	60	0.0%	0.0%
hit ⓘ Specialized instructions that complete.	61,903,860	100.0%	61,903,860	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	1,320	100.0%	1,320	100.0%	0.0%
Failure	0	0.0%	0	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.	841,540	100.0%	841,540	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	160	100.0%	160	100.0%	0.0%
Failure	0	0.0%	0	0.0%

SEND

specialization stats for SEND family

Kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
deferred ⓘ Lists the number of "deferred" (i.e. not specialized) instructions executed.	1,400,920	21.7%	1,400,920	21.7%	0.0%
hit ⓘ Specialized instructions that complete.	5,044,820	78.3%	5,044,820	78.3%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	0	0.0%	0	0.0%
Failure	340	100.0%	340	100.0%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
other	340	100.0%	340	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.	3,359,340	5.8%	3,359,340	5.8%	0.0%
hit ⓘ Specialized instructions that complete.	53,192,520	91.1%	53,192,520	91.1%	0.0%
miss ⓘ Specialized instructions that deopt.	1,867,080	3.2%	1,867,080	3.2%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	36,180	97.7%	36,180	97.7%	0.0%
Failure	860	2.3%	860	2.3%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
overriding descriptor	840	97.7%	840	97.7%	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.	3,359,220	100.0%	3,359,220	100.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	20	100.0%	20	100.0%	0.0%
Failure	0	0.0%	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.	561,300	0.6%	561,300	0.6%	0.0%
hit ⓘ Specialized instructions that complete.	91,006,500	99.4%	91,006,500	99.4%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	580	74.4%	580	74.4%	0.0%
Failure	200	25.6%	200	25.6%	0.0%

Failure kind	Base Count	Base Ratio	Head Count	Head Ratio	Change
tuple	140	70.0%	140	70.0%	0.0%
sequence	60	30.0%	60	30.0%	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.	240	75.0%	240	75.0%	0.0%

Success	Base Count	Base Ratio	Head Count	Head Ratio	Change
Success	80	100.0%	80	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
Not specialized ⓘ Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.	17,236,820	0.9%	20,040,440	1.0%	16.3%
Basic ⓘ Instructions that are not and cannot be specialized, e.g. LOAD_FAST.	1,059,406,460	54.5%	1,056,602,840	54.3%	-0.3%
Specialized hits ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.	861,432,960	44.3%	861,432,960	44.3%	0.0%
Specialized misses ⓘ Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.	7,466,620	0.4%	7,466,620	0.4%	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	11,760,980	52.5%	11,760,980	52.5%	0.0%
CALL	5,157,300	23.0%	5,157,300	23.0%	0.0%
STORE_ATTR	3,359,340	15.0%	3,359,340	15.0%	0.0%
SEND	1,400,920	6.3%	1,400,920	6.3%	0.0%
TO_BOOL	561,300	2.5%	561,300	2.5%	0.0%
COMPARE_OP	140,720	0.6%	140,720	0.6%	0.0%
FOR_ITER	180	0.0%	180	0.0%	0.0%
BINARY_OP	120	0.0%	120	0.0%	0.0%
BINARY_SLICE	0	0.0%	0	0.0%
STORE_SLICE	0	0.0%	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
CALL_METHOD_DESCRIPTOR_NOARGS	3,424,000	45.8%	3,424,000	45.8%	0.0%
STORE_ATTR_SLOT	1,867,080	25.0%	1,867,080	25.0%	0.0%
CALL_METHOD_DESCRIPTOR_O	1,832,480	24.5%	1,832,480	24.5%	0.0%
LOAD_ATTR_SLOT	317,700	4.2%	317,700	4.2%	0.0%
LOAD_ATTR_METHOD_NO_DICT	12,720	0.2%	12,720	0.2%	0.0%
RESUME	12,580	0.2%	12,580	0.2%	0.0%
RESUME_CHECK	12,580	0.2%	12,580	0.2%	0.0%
LOAD_GLOBAL_BUILTIN	60	0.0%	60	0.0%	0.0%
CACHE	0	0.0%	0	0.0%
CALL_FUNCTION_EX	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	21,283,220	22.9%	21,283,220	22.9%	0.0%
Calls to Python functions inlined	71,837,740	77.1%	71,837,740	77.1%	0.0%
Calls via PyEval_EvalFrame (total)	21,283,220	22.9%	21,283,220	22.9%	0.0%
Calls via PyEval_EvalFrame (vector)	17,223,540	18.5%	17,223,540	18.5%	0.0%
Calls via PyEval_EvalFrame (generator)	4,059,680	4.4%	4,059,680	4.4%	0.0%
Calls via PyEval_EvalFrame (legacy)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (function vectorcall)	17,223,540	18.5%	17,223,540	18.5%	0.0%
Calls via PyEval_EvalFrame (build class)	0	0.0%	0	0.0%
Calls via PyEval_EvalFrame (slot)	1,544,140	1.7%	1,544,140	1.7%	0.0%
Calls via PyEval_EvalFrame (function ex)	559,860	0.6%	559,860	0.6%	0.0%
Calls via PyEval_EvalFrame (api)	60	0.0%	60	0.0%	0.0%
Calls via PyEval_EvalFrame (method)	11,478,580	12.3%	11,478,580	12.3%	0.0%
Frame objects created	120	0.0%	120	0.0%	0.0%
Frames pushed	91,576,140	98.3%	91,576,140	98.3%	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	111		109		-1.8%
Method cache collisions	563,201		568,010		0.9%
Method cache misses	563,790		568,528		0.8%
Method cache hits	37,757,470		37,752,732		-0.0%
Immortal decrefs	133,620,389	12.3%	133,625,062	12.3%	0.0%
Mortal increfs	178,293,005	18.0%	178,297,745	18.0%	0.0%
Immortal increfs	218,976,010	22.1%	218,980,725	22.1%	0.0%
Mortal decrefs	385,752,053	35.6%	385,756,852	35.6%	0.0%
Allocations to 4 kbytes	1,442,556	0.6%	1,442,549	0.6%	-0.0%
Method cache dunder hits	2,104,749		2,104,751		0.0%
Frees	186,493,311		186,493,332		0.0%
Allocations	184,816,816	73.4%	184,816,799	73.4%	-0.0%
Allocations to 512 bytes	183,374,260	72.8%	183,374,250	72.8%	-0.0%
Interpreter mortal decrefs	548,677,400	50.6%	548,677,390	50.6%	-0.0%
Allocations from freelist	66,986,000	26.6%	66,986,000	26.6%	0.0%
Frees to freelist	66,986,060		66,986,060		0.0%
Allocations over 4 kbytes	0	0.0%	0	0.0%
Inline values	4,060,040		4,060,040		0.0%
Interpreter mortal increfs	518,663,360	52.3%	518,663,360	52.3%	0.0%
Interpreter immortal increfs	76,357,560	7.7%	76,357,560	7.7%	0.0%
Interpreter immortal decrefs	15,823,600	1.5%	15,823,600	1.5%	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	13,260	160	439,199,562	37,169,550	33,847,310	13,260	160	439,199,656	37,169,312	33,847,548
2	0	0	0	0	0	0	0	0	0	0

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

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: 2025-04-16