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andyyu2004 merged 1 commit into from
Feb 23, 2026
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Simple benchmark example #48

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17 changes: 17 additions & 0 deletions README.md
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Expand Up @@ -54,6 +54,23 @@ Builds the kustomization and diffs the output against the reference `kustomize`
kustomizer debug diff-reference <directory>
```

## Performance

~20x faster than kustomize on a semi-realistic configuration (measured with [hyperfine](https://github.com/sharkdp/hyperfine)).

| Command | Mean | Range |
|--------------------|---------------------|----------------------|
| `kustomize build` | 1.599 s ± 0.297 s | 1.031 s … 1.866 s |
| `kustomizer build` | 83.6 ms ± 11.1 ms | 66.8 ms … 110.3 ms |

Reproduce with the test fixture in this repo:

```sh
KFLAGS='--load-restrictor LoadRestrictionsNone --enable-alpha-plugins --enable-exec'
DIR='kustomizer/tests/kustomizer/testdata/realistic/example-com/envs/production'
hyperfine --warmup 3 "kustomize build $KFLAGS $DIR" "kustomizer build $KFLAGS $DIR"
```

## Bug Reports

Please [open an issue](https://github.com/andyyu2004/kustomizer/issues/new) with a self-contained shell script in a code block that reproduces the problem. The script should write out the necessary files and run `kustomizer debug diff-reference` to show the discrepancy. For example:
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