This is probably not advanced, so I'll be short.
I just need the numbers:
1. Costume limit?
2. Pen stamp limit?
3. Max characters in a normal variable?
4. Max characters in item of a list?
5. Max items in list?
6. Max integer limit? I discovered it: 2^1024 is the highest number
7. Max game file size? (.sb3)
8. Max costume file size? (say I load a 1250kb file using Turbowarp's HD Upload feature, will it work on Scratch?)
9. Max sound file size?
10. Max number of sounds?
I can't use the Wiki so I cant get the numbers from there.
Thanks

1. theoretically infinite, but you would probably reach the project.json limit
2. infinite
3. idk, join block limit is 10240 i think
4. idk
5. 200,000
6. i think it's 1.7976931348623157e+308, as that's the max integer in js
7. technically 318GB, see this
8. 10MB (10,240KB)
9. same as 8
10. same as 1
note: 1, 7, 8, 9, and 10 don't apply to the offline editor.

1. I don't think there is a costume limit.
2. No pen stamp limit either
3. 10,240 characters [citation needed]
4. same as variable
5. 200,000
6. i think you can search “double precision floating point max limit” on google to get a better idea
7. 5MB for the project.json (rename .sb3 to .zip and extract to find out). I think the entire project limit is something very high and as such you probably won't exceed it.
8. 10MB
9. Also 10MB
10. I don't think there's a set limit, but too many will probably crash the editor with a bluescreen.

kccuber wrote:

3. 10,240 characters [citation needed]

This is no longer true - IIRC there isn't actually a hard limit on how long the maximum output of the join block is anymore, and the practical limit is very, very large. (source)

MrNanners wrote:

1. Costume limit?

Definitely less than 150,000 costumes.
MD5 hash length is 32, project.json limit is 5,000,000, so 5,000,000/32 = ~156,000

MrNanners wrote:

10. Max number of sounds?

Same as above.

MrNanners wrote:

8. Max costume file size?

10MB.

1. Costume limit?
None. In my experience, projects with >200 complex vector costumes can crash lower-ended computers.
3. Max characters in a normal variable?
None. However, if your project JSON is larger than 5mb, it wont save so don't make a variable 36 million characters long.
4. Max characters in item of a list?
See above
10. Max number of sounds?
Depends on the computer. This project has like 30 full length songs, and it crashes chromebooks but works fine on other computers.

SansStudios wrote:

Depends on the computer. This project has like 30 full length songs, and it crashes chromebooks but works fine on other computers.

70MB of just assets is probably why it crashed…

Chiroyce wrote:

SansStudios wrote:

Depends on the computer. This project has like 30 full length songs, and it crashes chromebooks but works fine on other computers.

70MB of just assets is probably why it crashed…

Jeez… never checked the requests log

There's probably some lesson here…

MrNanners wrote:

6. Max integer limit? I discovered it: 2^1024 is the highest number

2^1024 is the largest integer that can be represented, but another limit is typically more important.