windows.md

Fastest JSON Python module on Windows

The current cross-versions winner is usjon 🎉

Python 3.13

@@ Python 3.13.0 @@
+ ujson…………… loads:  2.016  x0.9 | dumps:  2.172  x0.7
+ pyjson5……… loads:  2.176  x1.0 | dumps:  3.042  x1.0
! json……………… loads:  2.176  x1.0 | dumps:  3.142  x1.0
- fast_json… loads:  2.001  x0.9 | dumps:  4.121  x1.3
- rapidjson… loads:  3.552  x1.6 | dumps:  1.909  x0.6
- simplejson loads:  2.544  x1.2 | dumps:  7.168  x2.3

Python 3.12

@@ Python 3.12.7 @@
+ ujson…………… loads:  2.056  x0.8 | dumps:  2.164  x0.7
+ pyjson5……… loads:  2.204  x0.8 | dumps:  3.138  x1.0
! json……………… loads:  2.621  x1.0 | dumps:  3.139  x1.0
- rapidjson… loads:  2.906  x1.1 | dumps:  1.907  x0.6
- fast_json… loads:  2.071  x0.8 | dumps:  4.021  x1.3
- simplejson loads:  2.610  x1.0 | dumps:  6.988  x2.2

Python 3.11

@@ Python 3.11.9 @@
+ ujson…………… loads:  1.912  x0.8 | dumps:  1.993  x0.6
+ pyjson5……… loads:  1.976  x0.9 | dumps:  2.636  x0.8
! json……………… loads:  2.257  x1.0 | dumps:  3.368  x1.0
- rapidjson… loads:  2.746  x1.2 | dumps:  1.929  x0.6
- fast_json… loads:  1.885  x0.8 | dumps:  3.872  x1.1
- simplejson loads:  2.467  x1.1 | dumps:  6.707  x2.0

Python 3.10

@@ Python 3.10.11 @@
+ ujson…………… loads:  1.934  x0.8 | dumps:  1.994  x0.6
+ pyjson5……… loads:  2.207  x0.9 | dumps:  2.817  x0.8
! json……………… loads:  2.385  x1.0 | dumps:  3.515  x1.0
- rapidjson… loads:  2.793  x1.2 | dumps:  2.286  x0.7
- fast_json… loads:  2.078  x0.9 | dumps:  4.462  x1.3
- simplejson loads:  2.785  x1.2 | dumps:  7.382  x2.1

Python 3.9

@@ Python 3.9.13 @@
+ ujson…………… loads:  1.929  x0.8 | dumps:  1.935  x0.6
+ pyjson5……… loads:  2.182  x0.9 | dumps:  2.808  x0.9
! json……………… loads:  2.442  x1.0 | dumps:  3.299  x1.0
- rapidjson… loads:  2.782  x1.1 | dumps:  1.889  x0.6
- fast_json… loads:  1.939  x0.8 | dumps:  4.503  x1.4
- simplejson loads:  3.078  x1.3 | dumps:  5.944  x1.8

Python 3.8 (no more updated since 2023-06-13)

@@ Python 3.8.17 @@
+ ujson…………… loads:  3.258  x0.7 | dumps:  3.056  x0.5
+ pyjson5……… loads:  3.825  x0.9 | dumps:  4.515  x0.8
! json……………… loads:  4.423  x1.0 | dumps:  6.017  x1.0
- rapidjson… loads:  4.501  x1.0 | dumps:  3.234  x0.5
- fast_json… loads:  3.458  x0.8 | dumps:  8.240  x1.4
- simplejson loads:  5.554  x1.3 | dumps: 10.366  x1.7

Python 3.7 (no more updated since 2023-05-18)

@@ Python 3.7.9 @@
+ ujson…………… loads:  2.585  x0.6 | dumps:  2.477  x0.5
+ rapidjson… loads:  3.676  x0.8 | dumps:  2.667  x0.5
! json……………… loads:  4.352  x1.0 | dumps:  5.361  x1.0
- pyjson5……… loads:  3.153  x0.7 | dumps:  5.373  x1.0
- fast_json… loads:  2.463  x0.6 | dumps:  7.240  x1.4
- simplejson loads:  5.321  x1.2 | dumps:  8.914  x1.7