fix(exp): set capacity for each batch

[jooola]

Inspired by the new golang 1.23 Chunk implementation: https://togithub.com/golang/go/issues/53987

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.53%. Comparing base (2db9575) to head (ff5f666).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #490 +/- ## ======================================= Coverage 71.52% 71.53% ======================================= Files 46 46 Lines 3909 3910 +1 ======================================= + Hits 2796 2797 +1 Misses 699 699 Partials 414 414 ```

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