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- Performance comparison
- ----------------------
- Here is a rough performance comparision of several JSON packages
- available for Lua:
- - DKJSON 1.0: One of the fastest pure Lua JSON implementations.
- - LuaJSON 1.0: A mixed Lua/C JSON implementation using LPeg.
- - CSJON 1.0: Pure C.
- The example JSON files used were taken from http://json.org/ and
- RFC 4627.
- === DKJSON === == LuaJSON === === CJSON ====
- == Decoding == Lua LuaJIT Lua LuaJIT Lua LuaJIT
- example1.json 1.0x 1.9x 3.4x 3.9x 12.3x 13.7x
- example2.json 1.0x 2.0x 3.6x 4.6x 12.2x 20.0x
- example3.json 1.0x 2.0x 3.9x 4.7x 13.1x 18.8x
- example4.json 1.0x 1.8x 3.7x 4.4x 11.9x 17.0x
- example5.json 1.0x 1.5x 4.0x 4.8x 14.6x 22.2x
- rfc-example1.json 1.0x 1.5x 3.2x 4.3x 11.7x 16.9x
- rfc-example2.json 1.0x 1.5x 3.7x 4.5x 10.3x 19.4x
- == Average ==> 1.0x 1.7x 3.5x 4.2x 11.3x 16.5x
- == Encoding ==
- example1.json 1.0x 1.8x 0.6x 1.4x 23.5x 23.4x
- example2.json 1.0x 2.0x 0.5x 1.2x 22.4x 22.4x
- example3.json 1.0x 1.8x 0.6x 1.3x 10.8x 13.4x
- example4.json 1.0x 1.2x 0.7x 1.5x 15.7x 17.2x
- example5.json 1.0x 1.5x 0.6x 1.4x 22.1x 20.4x
- rfc-example1.json 1.0x 1.4x 0.5x 1.1x 8.9x 9.2x
- rfc-example2.json 1.0x 1.4x 0.6x 1.3x 10.4x 10.9x
- == Average ==> 1.0x 1.6x 0.6x 1.3x 17.0x 17.2x
- CJSON spends a significant amount of time calling sprintf() to convert
- doubles to strings while encoding "rfc-example1.json". Hence it only
- shows a 9x improvement in this case.
- The performance gains available can vary widely. If performance is
- critical, I would recommend testing in a relevant environment with
- your intended data.
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