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perf: MakeDefaultConfig once #5082

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merged 2 commits into from
Nov 2, 2023
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@chlunde chlunde commented Mar 7, 2023

This shaves of another 2 seconds (62%) of the remaining execution time for a kustomization tree with 4000 documents, reducing the execution time from 4.79s to 1.82s

0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig

before:

(pprof) top30 -cum
Showing nodes accounting for 1.82s, 22.75% of 8s total
Dropped 408 nodes (cum <= 0.04s)
Showing top 30 nodes out of 308
    flat  flat%   sum%        cum   cum%
        0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).Execute
        0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).ExecuteC
        0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).execute
        0     0%     0%      4.79s 59.88%  main.main
        0     0%     0%      4.79s 59.88%  runtime.main
        0     0%     0%      4.79s 59.88%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
        0     0%     0%      4.22s 52.75%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
        0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
        0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
        0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
        0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
        0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
        0     0%     0%      4.05s 50.62%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
        0     0%     0%      3.22s 40.25%  runtime.systemstack
        0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker
        0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker.func2
    0.11s  1.38%  1.38%      3.03s 37.88%  runtime.gcDrain
        0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig
        0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeTransformerConfig
        0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.makeTransformerConfigFromBytes
        0     0%  1.38%      2.97s 37.12%  sigs.k8s.io/yaml.yamlUnmarshal
        0     0%  1.38%      2.91s 36.38%  sigs.k8s.io/yaml.Unmarshal (inline)
    1.34s 16.75% 18.12%      2.87s 35.88%  runtime.scanobject
        0     0% 18.12%      2.53s 31.62%  sigs.k8s.io/yaml.yamlToJSON
        0     0% 18.12%      1.91s 23.88%  gopkg.in/yaml%2ev2.unmarshal
        0     0% 18.12%      1.86s 23.25%  gopkg.in/yaml%2ev2.Unmarshal (partial-inline)
        0     0% 18.12%      1.43s 17.88%  gopkg.in/yaml%2ev2.(*parser).parse
    0.01s  0.12% 18.25%      1.27s 15.88%  gopkg.in/yaml%2ev2.(*parser).document
    0.01s  0.12% 18.38%      1.25s 15.62%  gopkg.in/yaml%2ev2.(*parser).mapping
    0.35s  4.38% 22.75%      1.21s 15.12%  runtime.mallocgc

after:

(pprof) top30 -cum
Showing nodes accounting for 0.84s, 24.42% of 3.44s total
Dropped 225 nodes (cum <= 0.02s)
Showing top 30 nodes out of 345
    flat  flat%   sum%        cum   cum%
        0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).Execute
        0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).ExecuteC
        0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).execute
        0     0%     0%      1.82s 52.91%  main.main
        0     0%     0%      1.82s 52.91%  runtime.main
        0     0%     0%      1.82s 52.91%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
        0     0%     0%      1.57s 45.64%  runtime.systemstack
        0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker
        0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker.func2
    0.03s  0.87%  0.87%      1.49s 43.31%  runtime.gcDrain
    0.62s 18.02% 18.90%      1.45s 42.15%  runtime.scanobject
        0     0% 18.90%      1.25s 36.34%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
        0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
        0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
        0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
        0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
        0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
        0     0% 18.90%      1.07s 31.10%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
        0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resmap.(*resWrangler).AsYaml
        0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resource.(*Resource).AsYAML
    0.11s  3.20% 22.09%      0.48s 13.95%  runtime.mallocgc
        0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateFile
        0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/resmap.(*Factory).FromFile
        0     0% 22.09%      0.33s  9.59%  sigs.k8s.io/kustomize/kyaml/yaml.(*RNode).MarshalJSON
    0.08s  2.33% 24.42%      0.32s  9.30%  runtime.greyobject
        0     0% 24.42%      0.30s  8.72%  sigs.k8s.io/kustomize/api/resmap.(*Factory).NewResMapFromBytes
        0     0% 24.42%      0.27s  7.85%  sigs.k8s.io/yaml.JSONToYAML
        0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).runTransformers
        0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).RNodesFromBytes
        0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).SliceFromBytes

@k8s-ci-robot k8s-ci-robot added cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Mar 7, 2023
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Hi @chlunde. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@k8s-ci-robot k8s-ci-robot added the size/M Denotes a PR that changes 30-99 lines, ignoring generated files. label Mar 7, 2023
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This PR looks good to me. I have some minor feedback.

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/ok-to-test

@k8s-ci-robot k8s-ci-robot added ok-to-test Indicates a non-member PR verified by an org member that is safe to test. and removed needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. labels Mar 10, 2023
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This PR has multiple commits, and the default merge method is: merge.
You can request commits to be squashed using the label: tide/merge-method-squash

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@k8s-ci-robot k8s-ci-robot added size/L Denotes a PR that changes 100-499 lines, ignoring generated files. and removed size/M Denotes a PR that changes 30-99 lines, ignoring generated files. labels Mar 12, 2023
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chlunde commented Mar 12, 2023

rebased for Go 1.20/CI fix

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LGTM +1

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/kind cleanup
/triage accepted
/priority backlog

@k8s-ci-robot k8s-ci-robot added kind/cleanup Categorizes issue or PR as related to cleaning up code, process, or technical debt. triage/accepted Indicates an issue or PR is ready to be actively worked on. priority/backlog Higher priority than priority/awaiting-more-evidence. labels Mar 23, 2023
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koba1t commented Apr 18, 2023

Hi @chlunde
Could you check the lint failure?

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chlunde commented May 16, 2023

@koba1t sorry for the delay, I removed the extra blank line now

@chlunde chlunde requested a review from natasha41575 May 25, 2023 09:20
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chlunde commented May 30, 2023

@natasha41575 is there anything I should do to move this forward?

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irvifa commented Aug 31, 2023

Thank you for your hard work 🎉

/lgtm

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Aug 31, 2023
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irvifa commented Aug 31, 2023

/unassign
/assign @koba1t
/assign @natasha41575
/assign @annasong20

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koba1t commented Sep 1, 2023

@natasha41575 Could you rerun CI?

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@chlunde can you rebase to rerun CI? I think once all the tests run & pass we will be good to go here

This shaves of another 2 seconds (62%) of the remaining execution
time for a kustomization tree with 4000 documents, reducing the execution
time from 4.79s to 1.82s

    0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig

before:

    (pprof) top30 -cum
    Showing nodes accounting for 1.82s, 22.75% of 8s total
    Dropped 408 nodes (cum <= 0.04s)
    Showing top 30 nodes out of 308
        flat  flat%   sum%        cum   cum%
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).Execute
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).ExecuteC
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).execute
            0     0%     0%      4.79s 59.88%  main.main
            0     0%     0%      4.79s 59.88%  runtime.main
            0     0%     0%      4.79s 59.88%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
            0     0%     0%      4.22s 52.75%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
            0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
            0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
            0     0%     0%      4.05s 50.62%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
            0     0%     0%      3.22s 40.25%  runtime.systemstack
            0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker
            0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker.func2
        0.11s  1.38%  1.38%      3.03s 37.88%  runtime.gcDrain
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeTransformerConfig
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.makeTransformerConfigFromBytes
            0     0%  1.38%      2.97s 37.12%  sigs.k8s.io/yaml.yamlUnmarshal
            0     0%  1.38%      2.91s 36.38%  sigs.k8s.io/yaml.Unmarshal (inline)
        1.34s 16.75% 18.12%      2.87s 35.88%  runtime.scanobject
            0     0% 18.12%      2.53s 31.62%  sigs.k8s.io/yaml.yamlToJSON
            0     0% 18.12%      1.91s 23.88%  gopkg.in/yaml%2ev2.unmarshal
            0     0% 18.12%      1.86s 23.25%  gopkg.in/yaml%2ev2.Unmarshal (partial-inline)
            0     0% 18.12%      1.43s 17.88%  gopkg.in/yaml%2ev2.(*parser).parse
        0.01s  0.12% 18.25%      1.27s 15.88%  gopkg.in/yaml%2ev2.(*parser).document
        0.01s  0.12% 18.38%      1.25s 15.62%  gopkg.in/yaml%2ev2.(*parser).mapping
        0.35s  4.38% 22.75%      1.21s 15.12%  runtime.mallocgc

after:

    (pprof) top30 -cum
    Showing nodes accounting for 0.84s, 24.42% of 3.44s total
    Dropped 225 nodes (cum <= 0.02s)
    Showing top 30 nodes out of 345
        flat  flat%   sum%        cum   cum%
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).Execute
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).ExecuteC
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).execute
            0     0%     0%      1.82s 52.91%  main.main
            0     0%     0%      1.82s 52.91%  runtime.main
            0     0%     0%      1.82s 52.91%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
            0     0%     0%      1.57s 45.64%  runtime.systemstack
            0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker
            0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker.func2
        0.03s  0.87%  0.87%      1.49s 43.31%  runtime.gcDrain
        0.62s 18.02% 18.90%      1.45s 42.15%  runtime.scanobject
            0     0% 18.90%      1.25s 36.34%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
            0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
            0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
            0     0% 18.90%      1.07s 31.10%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
            0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resmap.(*resWrangler).AsYaml
            0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resource.(*Resource).AsYAML
        0.11s  3.20% 22.09%      0.48s 13.95%  runtime.mallocgc
            0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateFile
            0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/resmap.(*Factory).FromFile
            0     0% 22.09%      0.33s  9.59%  sigs.k8s.io/kustomize/kyaml/yaml.(*RNode).MarshalJSON
        0.08s  2.33% 24.42%      0.32s  9.30%  runtime.greyobject
            0     0% 24.42%      0.30s  8.72%  sigs.k8s.io/kustomize/api/resmap.(*Factory).NewResMapFromBytes
            0     0% 24.42%      0.27s  7.85%  sigs.k8s.io/yaml.JSONToYAML
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).runTransformers
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).RNodesFromBytes
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).SliceFromBytes
Document updated code in MakeDefaultConfig.
Add unit tests to ensure DeepCopy works.
Add hints to other code to ensure DeepCopy is kept up to date.
@k8s-ci-robot k8s-ci-robot removed the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Oct 30, 2023
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chlunde commented Oct 30, 2023

@natasha41575 rebased, no conflicts so no new changes since last time. I can squash if you would like.

@natasha41575 natasha41575 added the tide/merge-method-squash Denotes a PR that should be squashed by tide when it merges. label Nov 2, 2023
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/lgtm
/approve

@k8s-ci-robot k8s-ci-robot added the lgtm "Looks good to me", indicates that a PR is ready to be merged. label Nov 2, 2023
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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: chlunde, natasha41575

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@k8s-ci-robot k8s-ci-robot added the approved Indicates a PR has been approved by an approver from all required OWNERS files. label Nov 2, 2023
@k8s-ci-robot k8s-ci-robot merged commit 2fda12d into kubernetes-sigs:master Nov 2, 2023
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shapirus commented Nov 3, 2023

This change has also significantly improved performance in Component-specific tests (using multiple invocations of kustomize binary), which is very nice:

Starting kustomize benchmark on Linux x86_64
kustomize versions: 
  5b51722
  2fda12d
iterations per test: 1000
tests: 
  1_no-patches
  2_patches-json6902
  3_patches-strategic-merge
  4_no-patches-unknown-kind
  5_component-no-base-no-patches
  6_component-json6902-over-base
  7_component-PSM-over-base
time unit: seconds

             test: 1   test: 2   test: 3   test: 4   test: 5   test: 6   test: 7
   5b51722      5.61      5.85     58.91      5.23     10.14     14.63     66.61
   2fda12d      5.47      5.73     58.90      5.30      5.57      8.08     60.52

Now only if we could improve patchesStrategicMerge performance... :)
Apparently it's the only thing left that's still using expensive openapi calls (#5422 (comment)).

@chlunde chlunde deleted the perf-4 branch November 3, 2023 09:25
antoooks pushed a commit to antoooks/kustomize that referenced this pull request Nov 21, 2023
* perf: MakeDefaultConfig once

This shaves of another 2 seconds (62%) of the remaining execution
time for a kustomization tree with 4000 documents, reducing the execution
time from 4.79s to 1.82s

    0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig

before:

    (pprof) top30 -cum
    Showing nodes accounting for 1.82s, 22.75% of 8s total
    Dropped 408 nodes (cum <= 0.04s)
    Showing top 30 nodes out of 308
        flat  flat%   sum%        cum   cum%
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).Execute
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).ExecuteC
            0     0%     0%      4.79s 59.88%  github.com/spf13/cobra.(*Command).execute
            0     0%     0%      4.79s 59.88%  main.main
            0     0%     0%      4.79s 59.88%  runtime.main
            0     0%     0%      4.79s 59.88%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
            0     0%     0%      4.22s 52.75%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
            0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
            0     0%     0%      4.18s 52.25%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
            0     0%     0%      4.06s 50.75%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
            0     0%     0%      4.05s 50.62%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
            0     0%     0%      3.22s 40.25%  runtime.systemstack
            0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker
            0     0%     0%      3.03s 37.88%  runtime.gcBgMarkWorker.func2
        0.11s  1.38%  1.38%      3.03s 37.88%  runtime.gcDrain
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeDefaultConfig
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.MakeTransformerConfig
            0     0%  1.38%      2.98s 37.25%  sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig.makeTransformerConfigFromBytes
            0     0%  1.38%      2.97s 37.12%  sigs.k8s.io/yaml.yamlUnmarshal
            0     0%  1.38%      2.91s 36.38%  sigs.k8s.io/yaml.Unmarshal (inline)
        1.34s 16.75% 18.12%      2.87s 35.88%  runtime.scanobject
            0     0% 18.12%      2.53s 31.62%  sigs.k8s.io/yaml.yamlToJSON
            0     0% 18.12%      1.91s 23.88%  gopkg.in/yaml%2ev2.unmarshal
            0     0% 18.12%      1.86s 23.25%  gopkg.in/yaml%2ev2.Unmarshal (partial-inline)
            0     0% 18.12%      1.43s 17.88%  gopkg.in/yaml%2ev2.(*parser).parse
        0.01s  0.12% 18.25%      1.27s 15.88%  gopkg.in/yaml%2ev2.(*parser).document
        0.01s  0.12% 18.38%      1.25s 15.62%  gopkg.in/yaml%2ev2.(*parser).mapping
        0.35s  4.38% 22.75%      1.21s 15.12%  runtime.mallocgc

after:

    (pprof) top30 -cum
    Showing nodes accounting for 0.84s, 24.42% of 3.44s total
    Dropped 225 nodes (cum <= 0.02s)
    Showing top 30 nodes out of 345
        flat  flat%   sum%        cum   cum%
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).Execute
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).ExecuteC
            0     0%     0%      1.82s 52.91%  github.com/spf13/cobra.(*Command).execute
            0     0%     0%      1.82s 52.91%  main.main
            0     0%     0%      1.82s 52.91%  runtime.main
            0     0%     0%      1.82s 52.91%  sigs.k8s.io/kustomize/kustomize/v5/commands/build.NewCmdBuild.func1
            0     0%     0%      1.57s 45.64%  runtime.systemstack
            0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker
            0     0%     0%      1.49s 43.31%  runtime.gcBgMarkWorker.func2
        0.03s  0.87%  0.87%      1.49s 43.31%  runtime.gcDrain
        0.62s 18.02% 18.90%      1.45s 42.15%  runtime.scanobject
            0     0% 18.90%      1.25s 36.34%  sigs.k8s.io/kustomize/api/krusty.(*Kustomizer).Run
            0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).MakeCustomizedResMap (inline)
            0     0% 18.90%      1.21s 35.17%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).makeCustomizedResMap
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).AccumulateTarget
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateResources
            0     0% 18.90%      1.08s 31.40%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateTarget
            0     0% 18.90%      1.07s 31.10%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateDirectory
            0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resmap.(*resWrangler).AsYaml
            0     0% 18.90%      0.57s 16.57%  sigs.k8s.io/kustomize/api/resource.(*Resource).AsYAML
        0.11s  3.20% 22.09%      0.48s 13.95%  runtime.mallocgc
            0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).accumulateFile
            0     0% 22.09%      0.45s 13.08%  sigs.k8s.io/kustomize/api/resmap.(*Factory).FromFile
            0     0% 22.09%      0.33s  9.59%  sigs.k8s.io/kustomize/kyaml/yaml.(*RNode).MarshalJSON
        0.08s  2.33% 24.42%      0.32s  9.30%  runtime.greyobject
            0     0% 24.42%      0.30s  8.72%  sigs.k8s.io/kustomize/api/resmap.(*Factory).NewResMapFromBytes
            0     0% 24.42%      0.27s  7.85%  sigs.k8s.io/yaml.JSONToYAML
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/internal/target.(*KustTarget).runTransformers
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).RNodesFromBytes
            0     0% 24.42%      0.25s  7.27%  sigs.k8s.io/kustomize/api/resource.(*Factory).SliceFromBytes

* Tests and comments for MakeDefaultConfig perf work

Document updated code in MakeDefaultConfig.
Add unit tests to ensure DeepCopy works.
Add hints to other code to ensure DeepCopy is kept up to date.
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