* fix edge cases in memsize_to_str()
Inputs <= 1 now return "0.00 B" for 0 and "1.00 B" for 1, avoiding an
IndexError. Also, memsize_to_str(1000) now returns "1.00 KB" instead of
"1000.00 B".
Replaced the list comprehension with a next(...) generator for conciseness
and efficiency.
* simplify code using idiomatic python
- Remove the unused `memsize_to_str()` function in helpers.
- Use a tuple for checking multiple string prefixes/suffixes.
- Avoid unnecessary list construction by using iterables directly.
- Check None in @diskcache to ensure proper caching of falsy values.
* revert generators back to list comprehension
Sometimes building list first could be faster. Keep it as is.
05e3202fba
