Created
March 11, 2019 06:06
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benchmark native and json.el #emacs
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;;; Usage: /path/to/emacs -Q --batch -l /path/to/benchmark-native-json.el | |
;;; Date: 2019-03-10_15.53.34 | |
(require 'json) | |
(defconst json-string | |
;; @from https://github.com/syohex/emacs-parson/blob/master/bench/bench.json | |
"{ | |
\"glossary\": { | |
\"title\": \"example glossary\", | |
\"GlossDiv\": { | |
\"title\": \"S\", | |
\"GlossList\": { | |
\"GlossEntry\": { | |
\"ID\": \"SGML\", | |
\"SortAs\": \"SGML\", | |
\"GlossTerm\": \"Standard Generalized Markup Language\", | |
\"Acronym\": \"SGML\", | |
\"Abbrev\": \"ISO 8879:1986\", | |
\"GlossDef\": { | |
\"para\": \"A meta-markup language, used to create markup languages such as DocBook.\", | |
\"GlossSeeAlso\": [ | |
\"GML\", | |
\"XML\" | |
] | |
}, | |
\"GlossSee\": \"markup\" | |
} | |
} | |
} | |
} | |
}") | |
(defmacro run-benchmark (exp) | |
`(message "%-66S ;; => %s" | |
',exp | |
(let ((inhibit-message t)) | |
(with-temp-buffer | |
,exp)))) | |
(message (replace-regexp-in-string "\n" "" (emacs-version))) | |
(run-benchmark (benchmark '100000 '(json-serialize nil))) | |
(run-benchmark (benchmark '100000 '(json-encode nil))) | |
(run-benchmark (benchmark '100000 '(json-serialize [1 2 3 4 5]))) | |
(run-benchmark (benchmark '100000 '(json-encode [1 2 3 4 5]))) | |
(run-benchmark (benchmark '100000 '(json-parse-string "[true]"))) | |
(run-benchmark (benchmark '100000 '(json-read-from-string "[true]"))) | |
(run-benchmark (benchmark '100000 '(json-parse-string "{}"))) | |
(run-benchmark (benchmark '100000 '(json-read-from-string "{}"))) | |
(run-benchmark (benchmark '100000 '(json-parse-string json-string))) | |
(run-benchmark (benchmark '100000 '(json-read-from-string json-string))) | |
;;; benchmark-native-json.el ends here |
Author
twlz0ne
commented
Mar 11, 2019
~/s/emacs $ src/emacs -Q --batch -l benchmark-native-json.el
GNU Emacs 28.0.50 (build 2, x86_64-apple-darwin18.7.0, NS appkit-1671.60 Version 10.14.6 (Build 18G1012)) of 2020-01-01
(benchmark '100000 '(json-serialize nil)) ;; => Elapsed time: 0.268941s (0.216736s in 15 GCs)
(benchmark '100000 '(json-encode nil)) ;; => Elapsed time: 0.122258s (0.208184s in 14 GCs)
(benchmark '100000 '(json-serialize [1 2 3 4 5])) ;; => Elapsed time: 0.400901s (0.224517s in 15 GCs)
(benchmark '100000 '(json-encode [1 2 3 4 5])) ;; => Elapsed time: 1.883898s (1.276191s in 88 GCs)
(benchmark '100000 '(json-parse-string "[true]")) ;; => Elapsed time: 0.220715s (0.236130s in 16 GCs)
(benchmark '100000 '(json-read-from-string "[true]")) ;; => Elapsed time: 1.983789s (1.286500s in 85 GCs)
(benchmark '100000 '(json-parse-string "{}")) ;; => Elapsed time: 0.590364s (0.561388s in 39 GCs)
(benchmark '100000 '(json-read-from-string "{}")) ;; => Elapsed time: 2.003027s (1.374641s in 81 GCs)
(benchmark '100000 '(json-parse-string json-string)) ;; => Elapsed time: 11.416063s (7.924459s in 496 GCs)
(benchmark '100000 '(json-read-from-string json-string)) ;; => Elapsed time: 19.642221s (13.262667s in 866 GCs)
It seems json.c was improved in recents months.
https://github.com/emacs-mirror/emacs/commits/master/src/json.c
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