feat: add prealloc linter

.golangci.yml

@@ -30,6 +30,7 @@ linters:
     - unparam
     - unused
     - whitespace
+    - prealloc
 
 service:
   golangci-lint-version: 1.55.2 # use the fixed version to not introduce new linters unexpectedly

couchbase/client.go

@@ -406,8 +406,10 @@ func (s *client) GetVBucketSeqNos() (*wrapper.ConcurrentSwissMap[uint16, uint64]
 	seqNos := wrapper.CreateConcurrentSwissMap[uint16, uint64](1024)
 
 	hasCollectionSupport := s.dcpAgent.HasCollectionsSupport()
-	var collectionIDs []uint32
-	for collectionID := range s.GetCollectionIDs(s.config.ScopeName, s.config.CollectionNames) {
+
+	cIds := s.GetCollectionIDs(s.config.ScopeName, s.config.CollectionNames)
+	collectionIDs := make([]uint32, 0, len(cIds))
+	for collectionID := range cIds {
 		collectionIDs = append(collectionIDs, collectionID)
 	}
 	collectionIDSize := len(collectionIDs)

couchbase/rollback_mitigation.go

@@ -238,7 +238,7 @@ func (r *rollbackMitigation) loadVbUUID(vbID uint16) error {
 
 	r.vbUUIDMap.Store(vbID, failoverLogs[0].VbUUID)
 
-	var failoverInfos []string
+	failoverInfos := make([]string, 0, len(failoverLogs))
 	for index, failoverLog := range failoverLogs {
 		failoverInfos = append(
 			failoverInfos,

servicediscovery/service_discovery.go

@@ -197,7 +197,7 @@ func (s *serviceDiscovery) GetAll() []string {
 		return s1.ClusterJoinTime < s2.ClusterJoinTime
 	}).Sort(services)
 
-	var names []string
+	names := make([]string, 0, len(services))
 
 	for _, service := range services {
 		names = append(names, service.Name)