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[improve] Handle PositionInfo that's too large to serialize as a single entry #17
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dlg99
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Cpick/cursor large state
[improve] Handle PositionInfo that's too large to serialize as a single entry
May 28, 2024
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(cherry picked from commit 1ef9664)
* serialize/compress without intermediate byte arrays * use lightproto for cursor serialization to the ledger * Reuse PositionInfo (cherry picked from commit 1887c44)
(cherry picked from commit 98a3d25)
* ManagedCursor: manually serialise PositionInfo * Add tests and save last serialized side to prevent reallocations (cherry picked from commit 8a365d0)
(cherry picked from commit 44ba614)
(cherry picked from commit f1323c6)
(cherry picked from commit d4b94ab)
(cherry picked from commit 5f07f0c)
(cherry picked from commit 6d2e494)
…pache#275) (cherry picked from commit 6a2a010)
(cherry picked from commit 4c5387d)
(cherry picked from commit c3fe80e)
…footer of the chunked data (apache#282) (cherry picked from commit 6e72ecb)
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Motivation
In some cases cursor position info can be too large to serialize as a single entry, e.g. in case of too many deleted ranges. Also the serialization can be too slow.
cherry-picks of changes by @eolivelli @nicoloboschi and I.
Modifications
Cursor PositionInfo serialization is reworked to produce less garbage/serialize faster; serialized data can be compressed.
In case the serialized data too large it is chunked and saved as a sequence of entries.
Verifying this change
This change added tests.
Does this pull request potentially affect one of the following parts:
NO
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