test_msize()
Documentation for tests/benchmark/compute/instruction/test_memory.py::test_msize@c17999c0.
Generate fixtures for these test cases for Amsterdam with:
fill -v tests/benchmark/compute/instruction/test_memory.py::test_msize --gas-benchmark-values 1
Benchmark MSIZE instruction.
Source code in tests/benchmark/compute/instruction/test_memory.py
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58 | @pytest.mark.repricing(mem_size=1)
# MSIZE should be O(1), but sweep mem_size so a size-dependent
# implementation shows up as a regression. ExtCallGenerator re-expands
# memory in every call frame, so once the expansion outweighs a frame's
# MSIZE work (~16 KiB), loop in a single frame instead, paying one POP
# per MSIZE but expanding only once.
@pytest.mark.parametrize("mem_size", [0, 1, 1_000, 100_000, 1_000_000])
def test_msize(
benchmark_test: BenchmarkTestFiller,
fork: Fork,
mem_size: int,
) -> None:
"""Benchmark MSIZE instruction."""
setup = Op.POP(Op.MLOAD(Op.SELFBALANCE))
expansion_gas = fork.memory_expansion_gas_calculator()(new_bytes=mem_size)
frame_msize_gas = fork.max_stack_height() * fork.gas_costs().BASE
code_generator: BenchmarkCodeGenerator
if expansion_gas <= frame_msize_gas:
code_generator = ExtCallGenerator(
setup=setup,
attack_block=Op.MSIZE,
contract_balance=mem_size,
)
else:
code_generator = JumpLoopGenerator(
setup=setup,
attack_block=Op.POP(Op.MSIZE),
contract_balance=mem_size,
)
benchmark_test(
target_opcode=Op.MSIZE,
code_generator=code_generator,
)
|
Parametrized Test Cases
This test generates 5 parametrized test cases across 3 forks.