Speedups for encoding.py

[Gsantomaggio]

No description provided.

[Gsantomaggio]

@qweeze looking rstream/schema.py:7: error: Module "typing" has no attribute "TypeGuard" any idea?

[Gsantomaggio]

@qweeze, we have tried to understand the problem without success. We tried 3.9 and 3.11, and there were different errors. The performances are better, and it is worth investigating.

[qweeze]

Module "typing" has no attribute "TypeGuard"

TypeGuard was only introduced in python 3.10, so we can't use it if we want to support older python versions. I removed it here b658976
BTW, should we support python < 3.10?

KeyError: '__spec__'

Seems to be a library issue, perhaps versions bump will help?

[Gsantomaggio]

BTW, should we support python < 3.10?

That's a good question. I tend to be conservative but if it is necessary we can bump the requirement to 3.10.

@lukebakken @DanielePalaia WDYT about?

[lukebakken]

Technically we should support Python 3.8 and beyond - https://devguide.python.org/versions/

[DanielePalaia]

HI @qweeze it seems like that a syntax like:

'EnumMeta' | 'NoneType' is not supported by Python 3.9

Is the | None really necessary here? The tests seem passing anyway without it.

[qweeze]

Is the | None really necessary here?

replaced it with Optional (which is basically the same, but with old syntax), seems to be working now

[Gsantomaggio]

thanks @qweeze !
looks good to me!