Possibility to parse attributes as array about fast-xml-parser

[winston01]

@amitguptagwl

Can you give any hint on the point to "tweak" to improve the performance on large XML files?

[Delagen]

Also parser hang with large xml files, where sax based gives more predictable result

[amitguptagwl]

Thanks for your contribution.
Regarding performance issue. Can you please tell me what exact behavior you experienced? What was the size of XML? And whether it was error out or took a long time to convert it into JSON? if it was error out then what was the error it thrown?

It can help me or others to tweak it.

[Delagen]

With small data this library faster up to 10-15 times
At xml 10M up to 1.5 times
At 100M it hang and terminates with allocation memory error
xml2js parse it at 14 seconds

[amitguptagwl]

thanks for this data. I never tested this for big XML yet. I think I know where I can tweak it. I'll do it as soon as I find some free time. Once again thanks for your time to do this comparison.

[amitguptagwl]

I tested for validator and I got to know that there are 2 reasons of failure.

1. RangeError: Maximum call stack size exceeded.
2. JS RegExp Very Long String

As I'm relying on RE heavily and JS RE engine is not able to parse a very long string (in MBs), it crashes. So either I'll have to change the implementation to read the string char-by-char and put many if conditions or I'll have to use some other 3rd party library or OS specific commands to parse it.

[Delagen]

I think this issue can be closed? Performance issues is not the subject of this.

[amitguptagwl]

@Delagen I have updated the validator to handle large files as well.

[Delagen]

@amitguptagwl Thanks for work. Have you any performance comparison for large files?

[amitguptagwl]

I didn't check the exact time. But I guess it is few seconds for 98mb long file. There was total 21s for 66 tests. including large and small files