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Hey folks! I've decided to release HipJSON because this dependency is being used frequently in both Hipreme Engine and Redub, and the main difference is that it uses highly optimized data structures inside it:
- StringBuffer so all the string allocations are linear
- D Segmented Hashmap: A hashmap which does not require rehashing, thus making it the fastest solution possible for a JSON parser
- JSONArray which makes smart use of stack memory and promotion to dynamic memory on demand
It is the only JSON parser in D I saw being faster than the one present in JavaScript which I think it is a good benchmark as JSON is super important for web. Here are some stats comparison for some common JSON libraries:
STD JSON: 336 ms, 836 μs, and 6 hnsecs (50000 Tests)
JSONPIPE: 206 ms and 571 μs (50000 Tests)
MIR JSON: 266 ms, 770 μs, and 7 hnsecs (50000 Tests)
HipJSON: 86 ms, 881 μs, and 8 hnsecs (50000 Tests)
You can test it yourself as the documentation shows.
Against JavaScript:
JS performance of the parseJSON:
Parsed: 50 MB in 0.7036 s
Speed: 71.06 MB/s
HipJSON with dub test -b release-debug --compiler=ldc2
Parsed: 50MB in 606ms
MB per Second: 86.5162
Allocated: 739.969 MB
Free: 68.7608 MB
Used: 739.962 MB
Collection Count: 7
Collection Time: 273 ms, 757 μs, and 5 hnsecs
I may do a @nogc configuration in the future, but the refactor to do it is kinda big and I plan to use nulib as a backend.
Hope you guys enjoy it :)