Rust JSON Benchmark

This is a partial port of nativejson-benchmark to Rust. The libraries tested are:

• serde_json 1.0.53
• json-rust 0.12.4
• rustc-serialize 0.3.24
• simd-json 0.1.26 (this requires a modern x86 CPU for good results)

$ cargo run --release

                                DOM                STRUCT
======= serde_json ======= parse|stringify ===== parse|stringify ====
data/canada.json         280 MB/s   370 MB/s   510 MB/s   320 MB/s
data/citm_catalog.json   400 MB/s   420 MB/s   840 MB/s   660 MB/s
data/twitter.json        270 MB/s   730 MB/s   530 MB/s   850 MB/s

======= json-rust ======== parse|stringify ===== parse|stringify ====
data/canada.json         270 MB/s   830 MB/s
data/citm_catalog.json   550 MB/s   700 MB/s
data/twitter.json        410 MB/s   900 MB/s

==== rustc_serialize ===== parse|stringify ===== parse|stringify ====
data/canada.json         150 MB/s    65 MB/s   110 MB/s    45 MB/s
data/citm_catalog.json   180 MB/s   180 MB/s   130 MB/s   210 MB/s
data/twitter.json         99 MB/s   320 MB/s    75 MB/s   350 MB/s

======= simd-json ======== parse|stringify ===== parse|stringify ====
data/canada.json         350 MB/s   420 MB/s   580 MB/s
data/citm_catalog.json   820 MB/s   590 MB/s  1290 MB/s
data/twitter.json        660 MB/s   740 MB/s   900 MB/s

• Intel(R) Core(TM) i7-6600U CPU @ 2.60GHz (laptop CPU from 2015)
• rustc 1.46.0-nightly (118b50524 2020-06-06)

To update the numbers above, I run ./json-benchmark twice on an otherwise idle computer and take the greater of the two results for each number.

For comparison, here are results from RapidJSON on the same hardware with the nativejson-benchmark modified to run 256 times instead of 10. Code is in the cpp directory of this repo.

==== rapidjson-clang ===================== parse|stringify ====
data/canada.json                         380 MB/s   200 MB/s
data/citm_catalog.json                   680 MB/s  1090 MB/s
data/twitter.json                        320 MB/s   600 MB/s

===== rapidjson-gcc ====================== parse|stringify ====
data/canada.json                         390 MB/s   250 MB/s
data/citm_catalog.json                   890 MB/s  1650 MB/s
data/twitter.json                        440 MB/s   870 MB/s

• clang version 11.0.0-++20200128080810+b96e6859c99-1exp120200128191406.2758
• gcc version 10.1.0 (Ubuntu 10.1.0-2ubuntu1~18.04)

License