Yuzu SSBU Optimizer

Domain-focused tool to optimize Yuzu SSBU ZIPs for size and performance, aimed at emulator users, ROM packers, and modders.

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Total Calculations Run

< 15ms

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100%

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4.9 / 5.0

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About This Tool

The tool analyzes a Yuzu SSBU ZIP to optimize size and performance for emulator use. It examines the manifest and asset catalog, then proposes a packaging strategy that balances asset size, load times, and compatibility. It supports optional pruning of unused assets, deduplication of identical assets, and reordering to improve streaming efficiency. Results are exportable as a ready-to-run ZIP suitable for distribution or regional variants. This approach yields deterministic outcomes given the same inputs and provides compatibility indicators to reduce risk when deploying builds. Core features include manifest analysis, size estimation, recompression simulation, asset reordering, and integrity validation. Use cases include reducing ZIP footprint for distribution, preparing region-specific variants, and minimizing load stutter on slower storage. The tool emphasizes domain accuracy, reproducibility, and emulator-aligned packaging practices over generic ZIP optimizers, ensuring maintainable and testable results for SSBU builds.

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How to Use

Provide inputs: input_zip, target_region, target_performance_ms, output_zip.
Configure optional features: compression_level, deduplicate_assets, strip_unused_assets, patch_manifest.
Run optimization: trigger the two-pass analysis and synthesis passes.
Review outputs: check optimized_zip_size_mb, estimated_load_time_ms, is_compatible, and notes.
Save and deploy: use the output_zip in the emulator and verify gameplay stability.

Frequently Asked Questions

Find Quick Answers

What formats are supported for input and output?

Inputs must be standard ZIP archives containing SSBU assets with a valid manifest. Outputs are exported as a ZIP with the same structure, preserving the manifest and asset references. Binary data inside is preserved unless pruning is applied.

Will optimization affect game compatibility?

The tool performs compatibility checks and flags potential risks when stripping assets or rearranging files. It aims to preserve runtime integrity, but users should validate the resulting ZIP in Yuzu to confirm stability and functionality.

How scalable is the tool for large archives?

The workflow supports chunked processing for large ZIPs and large asset sets. Performance of analysis scales with the number of assets and manifest complexity, while memory usage is managed via streaming techniques during analysis.

Can I revert changes or test multiple configurations?

Yes. The tool can export multiple variants with different compression and pruning settings. Maintain a baseline ZIP for comparison and revert by re-importing the original input ZIP if needed.

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