json data loading is very slow on larger objects

Using json.loads() on larger objects (not very large, it’s enough to be aprox. 1 kB) is very slow. Looks like json module is using re, which causes this problem.

Trying to switch json to use _jsre, but this implementation is not working. json library is using match().end(), which returns different results for re and _jsre. Example:

>>> import re
>>> re.compile(" *").match("   test").end()
3
>>> import _jsre
>>> _jsre.compile(" *").match("   test").end()
1

Is it possible to fix this? Is _jsre still supported? Or is it possible to use process json differently? Also have no luck to use window.JSON.parse(), whcih returns hard to use JS objects.

[PierreQuentel]

Javascripts objects such as JSON are intended to be used through the javascript module, which adds a layer to make them usable with Brython :

from javascript import JSON

t = JSON.parse('{"data": [{"grp": 2}]}')
print(t) # prints "{'data': [{'grp': 2}]}"

They are also available as attributes of window (because the window object in Javascript mixes everything from the Web API to language-specific names), but I will add a deprecation message suggesting to use the javascript module instead.

[ondrejj]

May be an switch will be useful. Something like from future import …, just different names. Something what switches json.parse and other function to not fully compatible, but very fast mode. from brython import browser_json ?