Mini JSON parse

Hand-rolled JSON parser over a 100 KiB document with mixed nesting.

Runtime · median per inner-loop window

median of 7 runs

Native Gocompiled

13.6 ms0.12×

Pipitbytecode VM

117 msbaseline

CPython 3.14bytecode VM

171 ms1.46×

PyPy 7.3tracing JIT

121 ms1.03×

Ttengobytecode VM

no data

n/a

Sscriggobytecode VM

unsupported in scriggo

n/a

Mmvmbytecode VM

348 ms2.98×

YyaegiAST walker

1.65 s14.1×

Runner	N	Compile	Runtime	P95	Stddev	RSS	vs pipit	Status
Native Gocompiled	7	113 ms	13.6 ms	14.7 ms	534 µs	451 MiB	0.12×	OK
Pipitbytecode VM	7	2.85 ms	117 ms	122 ms	2.07 ms	311 MiB	1.00×	OK
CPython 3.14bytecode VM	7	908 µs	171 ms	180 ms	4.07 ms	n/a	1.46×	OK
PyPy 7.3tracing JIT	7	697 µs	121 ms	138 ms	8.26 ms	n/a	1.03×	OK
tengobytecode VM	0	n/a	n/a	n/a	n/a	n/a	n/a	no data
scriggobytecode VM	0	n/a	n/a	n/a	n/a	n/a	n/a	unsupported
mvmbytecode VM	7	864 µs	348 ms	401 ms	21.8 ms	1.52 GiB	2.98×	OK
yaegiAST walker	7	852 µs	1.65 s	1.77 s	73.5 ms	1.52 GiB	14.1×	OK

Workload & symmetry rules

Workload

Parse a 100 KiB JSON document into a generic tree, then walk the tree and sum every integer node. Print the sum.

Source code