### New Features in binary distributions

- 7 new data structures: JSON, Time series, Bloom filter, Cuckoo filter,
Count-min sketch, Top-k, t-digest
- Redis scalable query engine (including vector search)

### Potentially breaking changes

- #12272 `GETRANGE` returns an empty bulk when the negative end index is
out of range
- #12395 Optimize `SCAN` command when matching data type

### Bug fixes

- #13510 Fix `RM_RdbLoad` to enable AOF after RDB loading is completed
- #13489 `ACL CAT` - return module commands
- #13476 Fix a race condition in the `cache_memory` of `functionsLibCtx`
- #13473 Fix incorrect lag due to trimming stream via `XTRIM` command
- #13338 Fix incorrect lag field in `XINFO` when tombstone is after the
`last_id` of the consume group
- #13470 On `HDEL` of last field - update the global hash field
expiration data structure
- #13465 Cluster: Pass extensions to node if extension processing is
handled by it
- #13443 Cluster: Ensure validity of myself when loading cluster config
- #13422 Cluster: Fix `CLUSTER SHARDS` command returns empty array

### Modules API

- #13509 New API calls: `RM_DefragAllocRaw`, `RM_DefragFreeRaw`, and
`RM_RegisterDefragCallbacks` - defrag API to allocate and free raw
memory

### Performance and resource utilization improvements

- #13503 Avoid overhead of comparison function pointer calls in listpack
`lpFind`
- #13505 Optimize `STRING` datatype write commands
- #13499 Optimize `SMEMBERS` command
- #13494 Optimize `GEO*` commands reply
- #13490 Optimize `HELLO` command
- #13488 Optimize client query buffer
- #12395 Optimize `SCAN` command when matching data type
- #13529 Optimize `LREM`, `LPOS`, `LINSERT`, and `LINDEX` commands
- #13516 Optimize `LRANGE` and other commands that perform several
writes to client buffers per call
- #13431 Avoid `used_memory` contention when updating from multiple
threads

### Other general improvements

- #13495 Reply `-LOADING` on replica while flushing the db

### CLI tools

- #13411 redis-cli: Fix wrong `dbnum` showed after the client
reconnected

### Notes

- No backward compatibility for replication or persistence.
- Additional distributions, upgrade paths, features, and improvements
will be introduced in upcoming pre-releases.
- With the GA release of 8.0 we will deprecate Redis Stack.

…tTypeEqual (redis#13529)

This is a very easy optimization, that avoids duplicate computation of
the object length for LREM, LPOS, LINSERT na LINDEX.

We can see that sdslen takes 7.7% of the total CPU cycles of the
benchmarks.

Function Stack | CPU Time: Total | CPU Time: Self | Module | Function
(Full) | Source File | Start Address
-- | -- | -- | -- | -- | -- | --
listTypeEqual | 15.50% | 2.346s | redis-server | listTypeEqual |
t_list.c | 0x845dd
sdslen | 7.70% | 2.300s | redis-server | sdslen | sds.h | 0x845e4

Preliminary data showcases 4% improvement in the achievable ops/sec of
LPOS in string elements, and 2% in int elements.

### New Features in binary distributions

- 7 new data structures: JSON, Time series, Bloom filter, Cuckoo filter,
Count-min sketch, Top-k, t-digest
- Redis scalable query engine (including vector search)

### Potentially breaking changes

- redis#12272 `GETRANGE` returns an empty bulk when the negative end index is
out of range
- redis#12395 Optimize `SCAN` command when matching data type

### Bug fixes

- redis#13510 Fix `RM_RdbLoad` to enable AOF after RDB loading is completed
- redis#13489 `ACL CAT` - return module commands
- redis#13476 Fix a race condition in the `cache_memory` of `functionsLibCtx`
- redis#13473 Fix incorrect lag due to trimming stream via `XTRIM` command
- redis#13338 Fix incorrect lag field in `XINFO` when tombstone is after the
`last_id` of the consume group
- redis#13470 On `HDEL` of last field - update the global hash field
expiration data structure
- redis#13465 Cluster: Pass extensions to node if extension processing is
handled by it
- redis#13443 Cluster: Ensure validity of myself when loading cluster config
- redis#13422 Cluster: Fix `CLUSTER SHARDS` command returns empty array

### Modules API

- redis#13509 New API calls: `RM_DefragAllocRaw`, `RM_DefragFreeRaw`, and
`RM_RegisterDefragCallbacks` - defrag API to allocate and free raw
memory

### Performance and resource utilization improvements

- redis#13503 Avoid overhead of comparison function pointer calls in listpack
`lpFind`
- redis#13505 Optimize `STRING` datatype write commands
- redis#13499 Optimize `SMEMBERS` command
- redis#13494 Optimize `GEO*` commands reply
- redis#13490 Optimize `HELLO` command
- redis#13488 Optimize client query buffer
- redis#12395 Optimize `SCAN` command when matching data type
- redis#13529 Optimize `LREM`, `LPOS`, `LINSERT`, and `LINDEX` commands
- redis#13516 Optimize `LRANGE` and other commands that perform several
writes to client buffers per call
- redis#13431 Avoid `used_memory` contention when updating from multiple
threads

### Other general improvements

- redis#13495 Reply `-LOADING` on replica while flushing the db

### CLI tools

- redis#13411 redis-cli: Fix wrong `dbnum` showed after the client
reconnected

### Notes

- No backward compatibility for replication or persistence.
- Additional distributions, upgrade paths, features, and improvements
will be introduced in upcoming pre-releases.
- With the GA release of 8.0 we will deprecate Redis Stack.