performance_fp.md

Read and Write Time Comparison

Input filename	Size (MB)	Content
data/output/persons_fp.json	697.35	Text,doubles

Environment	Windows, Intel
Computer	Lenovo Thinkpad X Extreme with 8 cores, 16 hardware threads, 32 GB memory, 2 TB solid state drive
Operating system	Windows 2011
Compiler	Visual Studio 2022
Language	C++ 2017

Library	Version
jsoncons	0.170.0
nlohmann	3.11.2
cJSON	1.7.15
json11	2017-06-20-2
rapidjson	2020-02-08
jsoncpp	1.9.5
json_spirit	4.1.0-1
taojson	2020-09-14

Library	Time to read (s)	Time to write (s)	Memory footprint of json value (MB)	Remarks
jsoncons	17.857	10.33	1057	Uses sorted std::vector of key/value pairs for objects, expect smaller memory footprint.Uses slightly modified grisu3_59_56 implementation by Florian Loitsch plus fallback for printing doubles, expect faster serializing.
nlohmann	25.571	19.382	1234	Uses std::map for objects. Uses slightly modified Grisu2 implementation by Florian Loitsch for printing doubles, expect faster serializing.
cJSON	24.152	69.649	5813	Inefficient storage (items do not share the same space), expect larger memory footprint. Uses sprintf and sscanf to support locale-independent round-trip.
json11	24.445	46.515	4905	Uses pimpl idiom, implementation uses virtual inheritance, expect larger memory footprint.
rapidjson	5.263	7.552	1099	Uses custom floating point parsing, expect faster parsing. Uses girsu3 for printing doubles, expect faster serializing. Uses custom allocation and flat map for objects, expect smaller memory footprint.
jsoncpp	134.955	80.718	6163	Uses std::map for both arrays and objects, expect larger memory footprint.
json_spirit	336.491	141.197	2732	Uses Boost spirit parsing, expect slower parsing.
taojson	63.515	13.888	2654	Uses modified google/double conversion routines for parsing doubles. Uses modified jeaiii/itoa routines for outputting integers. Uses slightly modified Grisu2 implementation by Florian Loitsch for printing doubles, expect faster serializing.