go tool pprof 127.0.0.1:6000/debug/pprof/heap
Fetching profile over HTTP from http://127.0.0.1:6000/debug/pprof/heap
Saved profile in /home/adr/pprof/pprof.kcp.alloc_objects.alloc_space.inuse_objects.inuse_space.006.pb.gz
File: kcp
Type: inuse_space
Time: Oct 5, 2023 at 1:50pm (CEST)
Entering interactive mode (type "help" for commands, "o" for options)
(pprof) web
(pprof) top30
Showing nodes accounting for 765.23MB, 87.94% of 870.15MB total
Dropped 718 nodes (cum <= 4.35MB)
Showing top 30 nodes out of 164
      flat  flat%   sum%        cum   cum%
  646.50MB 74.30% 74.30%   646.50MB 74.30%  k8s.io/utils/buffer.NewRingGrowing (inline)
   32.01MB  3.68% 77.98%    32.01MB  3.68%  runtime.malg
   23.04MB  2.65% 80.62%    23.04MB  2.65%  go.etcd.io/etcd/api/v3/etcdserverpb.(*InternalRaftRequest).Marshal
      16MB  1.84% 82.46%   662.50MB 76.14%  github.com/kcp-dev/apimachinery/v2/third_party/informers.newProcessListener
    6.38MB  0.73% 83.20%     6.38MB  0.73%  google.golang.org/grpc/internal/transport.newBufWriter
    5.29MB  0.61% 83.80%     6.36MB  0.73%  compress/flate.NewWriter
       5MB  0.57% 84.38%   336.44MB 38.66%  k8s.io/apiserver/pkg/admission/configuration.NewValidatingWebhookConfigurationManagerForInformer
    4.50MB  0.52% 84.90%     4.50MB  0.52%  runtime.allocm
    4.50MB  0.52% 85.41%     4.50MB  0.52%  k8s.io/apimachinery/pkg/runtime.DeepCopyJSONValue
    4.50MB  0.52% 85.93%   664.66MB 76.38%  github.com/kcp-dev/apimachinery/v2/third_party/informers.(*scopedSharedIndexInformer).AddEventHandlerWithResyncPeriod
       4MB  0.46% 86.39%        6MB  0.69%  github.com/kcp-dev/apimachinery/v2/third_party/informers.(*processorListener).run
       4MB  0.46% 86.85%   335.69MB 38.58%  k8s.io/apiserver/pkg/admission/configuration.NewMutatingWebhookConfigurationManagerForInformer
       3MB  0.35% 87.20%     5.50MB  0.63%  k8s.io/kube-openapi/pkg/util/proto.(*Definitions).parseKind
    2.50MB  0.29% 87.48%    11.51MB  1.32%  k8s.io/kubernetes/pkg/generated/openapi.GetOpenAPIDefinitions
    2.50MB  0.29% 87.77%     4.50MB  0.52%  sigs.k8s.io/json/internal/golang/encoding/json.(*decodeState).objectInterface
       1MB  0.11% 87.88%        5MB  0.57%  k8s.io/apimachinery/pkg/runtime.structToUnstructured
    0.50MB 0.057% 87.94%     5.50MB  0.63%  k8s.io/apimachinery/pkg/runtime.(*unstructuredConverter).ToUnstructured
         0     0% 87.94%     6.36MB  0.73%  bufio.(*Writer).Flush
         0     0% 87.94%     6.36MB  0.73%  compress/gzip.(*Writer).Write
         0     0% 87.94%    23.54MB  2.70%  github.com/grpc-ecosystem/go-grpc-middleware.ChainUnaryServer.func1
         0     0% 87.94%    23.54MB  2.70%  github.com/grpc-ecosystem/go-grpc-middleware.ChainUnaryServer.func1.1.1
         0     0% 87.94%    23.54MB  2.70%  github.com/grpc-ecosystem/go-grpc-prometheus.(*ServerMetrics).UnaryServerInterceptor.func1
         0     0% 87.94%   663.13MB 76.21%  github.com/kcp-dev/apimachinery/v2/third_party/informers.(*scopedSharedIndexInformer).AddEventHandler
         0     0% 87.94%   663.20MB 76.22%  github.com/kcp-dev/apimachinery/v2/third_party/informers.(*sharedIndexInformer).AddEventHandlerWithResyncPeriod
         0     0% 87.94%   336.69MB 38.69%  github.com/kcp-dev/kcp/pkg/admission/mutatingwebhook.(*Plugin).Admit
         0     0% 87.94%   336.69MB 38.69%  github.com/kcp-dev/kcp/pkg/admission/mutatingwebhook.(*Plugin).getHookSource
         0     0% 87.94%   336.94MB 38.72%  github.com/kcp-dev/kcp/pkg/admission/validatingwebhook.(*Plugin).Validate
         0     0% 87.94%   336.94MB 38.72%  github.com/kcp-dev/kcp/pkg/admission/validatingwebhook.(*Plugin).getHookSource
         0     0% 87.94%    20.41MB  2.35%  github.com/kcp-dev/kcp/pkg/authorization.WithDeepSubjectAccessReview.func1
         0     0% 87.94%    20.91MB  2.40%  github.com/kcp-dev/kcp/pkg/authorization.WithSubjectAccessReviewAuditAnnotations.func1