Comments on: simple_json 1.0 http://bob.pythonmac.org/archives/2005/12/26/simple_json-10/ Bob's Rants Fri, 05 Sep 2008 21:40:41 +0000 http://wordpress.org/?v=2.5.1 By: Koen http://bob.pythonmac.org/archives/2005/12/26/simple_json-10/#comment-2749 Koen Tue, 03 Jan 2006 15:32:21 +0000 http://bob.pythonmac.org/?p=189#comment-2749 Okay, I have just checked my JSONReader against SimpleJSON on a 6MB and a 4.5MB file. On a Athlon XP 2000+ I get the following times: 6 MB file: 1.2s for JSONReader, 31.5s for SimpleJSON. 4.5 MB file: 1.1s for JSONReader, 24.1s for SimpleJSON. I have to make some notes: - JSONReader uses the standard C API to open a file through a filename. If I read the file into memory completely in Python and then use JSONReader's from-string reading API (e.g. not using the standard C file API), then times are 1.3s, 1.1s respectively. Supporting a StringIO API is non-trivial because of the lex/yacc basis, I haven't looked at this yet. Perhaps it is possible to make it use a .read() interface, but I think it will be hard. - Only works on ASCII strings. Characters 128-255 are kept as normal characters and not interpreted at all. So they should come out the way they come in (I do not rely on this behavior, I only use \uXXXX). Okay, I have just checked my JSONReader against SimpleJSON on a 6MB and a 4.5MB file.
On a Athlon XP 2000+ I get the following times:
6 MB file: 1.2s for JSONReader, 31.5s for SimpleJSON.
4.5 MB file: 1.1s for JSONReader, 24.1s for SimpleJSON.

I have to make some notes:
- JSONReader uses the standard C API to open a file through a filename. If I read the file into memory completely in Python and then use JSONReader’s from-string reading API (e.g. not using the standard C file API), then times are 1.3s, 1.1s respectively. Supporting a StringIO API is non-trivial because of the lex/yacc basis, I haven’t looked at this yet. Perhaps it is possible to make it use a .read() interface, but I think it will be hard.
- Only works on ASCII strings. Characters 128-255 are kept as normal characters and not interpreted at all. So they should come out the way they come in (I do not rely on this behavior, I only use \uXXXX).

]]> By: nick http://bob.pythonmac.org/archives/2005/12/26/simple_json-10/#comment-2747 nick Thu, 29 Dec 2005 17:19:23 +0000 http://bob.pythonmac.org/?p=189#comment-2747 This is a much better implementation, good job. But to be fair, json-py is a straight Python implementation of the Javascript reference implementation. This is a much better implementation, good job. But to be fair, json-py is a straight Python implementation of the Javascript reference implementation.

]]> By: bob http://bob.pythonmac.org/archives/2005/12/26/simple_json-10/#comment-2740 bob Tue, 27 Dec 2005 02:14:04 +0000 http://bob.pythonmac.org/?p=189#comment-2740 It would be nice to have as an optional extension, like elementree vs cElementTree. Do you have benchmarks? It would be nice to have as an optional extension, like elementree vs cElementTree. Do you have benchmarks?

]]> By: Koen http://bob.pythonmac.org/archives/2005/12/26/simple_json-10/#comment-2733 Koen Mon, 26 Dec 2005 20:53:11 +0000 http://bob.pythonmac.org/?p=189#comment-2733 Hmm, interesting. This summer I wrote a JSONReader C module (basically it will parse into native Python structures through a Python extension) with very high efficiency. I offered it to be included into json-py, and the author said yes, but I haven't heard from him since. The module is still unreleased because of this, so maybe it can find it's way into Simple-JSON? It's only a decoder, not an encoder. Mail me if you're interested (I'll be on vacation the coming week though). Hmm, interesting. This summer I wrote a JSONReader C module (basically it will parse into native Python structures through a Python extension) with very high efficiency. I offered it to be included into json-py, and the author said yes, but I haven’t heard from him since.
The module is still unreleased because of this, so maybe it can find it’s way into Simple-JSON? It’s only a decoder, not an encoder. Mail me if you’re interested (I’ll be on vacation the coming week though).

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