dferstay opened a new pull request #316:
URL: https://github.com/apache/pulsar-client-go/pull/316
An int occupies one word of memory; on 64-bit machines, this is 8 bytes.
As a result, the messageID struct is 56-bytes:
* ledgerID - 8 bytes
* entryID - 8 bytes
* batchIdx - 8 bytes
* partitionIdx - 8 bytes
* tracker - 8 bytes
* consumer - 16 bytes (1 word for type, 1 word for data address)
This commit changes the type batchIdx and partitionIdx fields to int32,
which saves one word of memory and maintains alignment of struct fields.
Reducing the size of the MessageID structs is important as they are
currently allocated on the heap for every message produced or consumed.
Signed-off-by: Daniel Ferstay <dfers...@splunk.com>
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### Motivation
The motivation is to reduce the amount of heap allocated memory for each
message produced and consumed.
### Modifications
This commit changes the type batchIdx and partitionIdx fields to int32,
which saves one word of memory and maintains alignment of struct fields.
### Verifying this change
- [ ] Make sure that the change passes the CI checks.
This change is already covered by existing tests that produce or consume
messages.
### Does this pull request potentially affect one of the following parts:
*If `yes` was chosen, please highlight the changes*
- Dependencies (does it add or upgrade a dependency): no
- The public API: no
- The schema: no
- The default values of configurations: no
- The wire protocol: no
### Documentation
- Does this pull request introduce a new feature? no
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