maplib_version_comparison.md

maplib benchmark: 0.20.15 vs 0.20.19

Old numbers = original run on your Mac (maplib 0.20.15). New numbers = re-run in Claude's Linux sandbox (maplib 0.20.19). Different hardware — treat absolute deltas as indicative only. For a valid version comparison, re-run both on the same machine.

medium (~100K triples)

Operation	0.20.15 (s)	0.20.19 (s)	Δ
Read Turtle	0.1394	0.1365	-2%
Write Turtle	0.1118	0.0755	-32%
Write N-Triples	0.0126	0.0165	+31%
Read N-Triples	0.0765	0.1343	+76%
Q1 count	0.0022	0.0019	-13%
Q2 top customers	0.0018	0.0017	-4%
Q3 3-way join	0.0032	0.0024	-25%
Q4 optional agg	0.0037	0.0026	-30%
Q5 construct	0.0095	0.0070	-26%
Q6 update	0.0033	0.0031	-7%

large (~1M triples)

Operation	0.20.15 (s)	0.20.19 (s)	Δ
Read Turtle	0.8020	1.3826	+72%
Write Turtle	0.7640	0.5164	-32%
Write N-Triples	0.0751	0.1062	+41%
Read N-Triples	0.7857	1.5053	+92%
Q1 count	0.0109	0.0111	+2%
Q2 top customers	0.0039	0.0043	+9%
Q3 3-way join	0.0065	0.0063	-4%
Q4 optional agg	0.0080	0.0076	-5%
Q5 construct	0.0172	0.0133	-22%
Q6 update	0.0052	0.0034	-34%

xlarge (~10M triples)

Operation	0.20.15 (s)	0.20.19 (s)	Δ
Read Turtle	9.2657	17.1292	+85%
Write Turtle	7.5203	5.8387	-22%
Write N-Triples	0.6778	1.2608	+86%
Read N-Triples	9.5568	16.9483	+77%
Q1 count	0.0772	0.1737	+125%
Q2 top customers	0.0185	0.0477	+158%
Q3 3-way join	0.0436	0.1026	+136%
Q4 optional agg	0.0473	0.1219	+158%
Q5 construct	0.0784	0.1208	+54%
Q6 update	0.0192	0.0187	-3%