experimental: Implement real reconciler for LB tables

FIXME split this up further

Signed-off-by: Jussi Maki <jussi@isovalent.com>

pkg/loadbalancer/experimental/benchmark_test.go

@@ -113,28 +113,12 @@ func BenchmarkInsertBackend(b *testing.B) {
 	)
 	wtxn.Commit()
 
-	numObjects := 1000
-
-	// Add 'numObjects' existing objects to the table.
-	wtxn = p.Writer.WriteTxn()
-	for i := 0; i < numObjects; i++ {
-		beAddr := *loadbalancer.NewL3n4Addr(loadbalancer.TCP, addrCluster1, uint16(i), loadbalancer.ScopeExternal)
-		p.Writer.UpsertBackends(
-			wtxn,
-			name,
-			source.Kubernetes,
-			&loadbalancer.Backend{
-				L3n4Addr: beAddr,
-				State:    loadbalancer.BackendStateActive,
-			},
-		)
-	}
-	wtxn.Commit()
-
 	b.ResetTimer()
 
-	// Benchmark the speed at which a new backend is upserted. 'numObjects' are inserted in one
-	// WriteTxn to amortize the cost of WriteTxn&Commit.
+	// Create 100 backends for the single service & frontend to benchmark a more extreme
+	// case.
+	numObjects := 100
+
 	for n := 0; n < b.N; n++ {
 		wtxn = p.Writer.WriteTxn()
 		for i := 0; i < numObjects; i++ {
@@ -156,6 +140,7 @@ func BenchmarkInsertBackend(b *testing.B) {
 	b.StopTimer()
 	b.ReportMetric(float64(b.N*numObjects)/b.Elapsed().Seconds(), "objects/sec")
 }
+
 func BenchmarkReplaceBackend(b *testing.B) {
 	p := fixture(b)