je-ik commented on pull request #13240:
URL: https://github.com/apache/beam/pull/13240#issuecomment-722338502
If we have reasons to believe, that reusing the `objectReuse` could result
in breaking existing pipelines (which I think is low probability, but is
admittedly non-zero), I'd suggest the following:
- deprecate `objectReuse`
- introduce `usingImmutableTypes` (or similar), which would have the
meaning of both `objectReuse` and `fasterCopy`
- remove `fasterCopy` and use only `usingImmutableTypes` in place of it
Using of `objectReuse` would result in deprecation warning, suggesting to
validate pipeline against DirectRunner with immutability enforced and then to
enable `usingImmutableTypes`.
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