From 79363daeb78485d61ad6ff24600408e4b855308c Mon Sep 17 00:00:00 2001 From: Mark Pulford Date: Wed, 4 May 2011 23:48:54 +0930 Subject: Add benchmark results (performance.txt) --- lua-cjson.spec | 2 +- performance.txt | 42 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 1 deletion(-) create mode 100644 performance.txt diff --git a/lua-cjson.spec b/lua-cjson.spec index d5eb0c2..45b42ba 100644 --- a/lua-cjson.spec +++ b/lua-cjson.spec @@ -39,7 +39,7 @@ rm -rf "$RPM_BUILD_ROOT" %files %defattr(-,root,root,-) -%doc LICENSE rfc4627.txt +%doc LICENSE performance.txt rfc4627.txt %{lualibdir}/* diff --git a/performance.txt b/performance.txt new file mode 100644 index 0000000..788eb9e --- /dev/null +++ b/performance.txt @@ -0,0 +1,42 @@ +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. -- cgit v1.2.3-55-g6feb