⚡ Bolt: [performance improvement] Parallelize exportIconsForYAML

[aafre]

💡 What:
Replaced a sequential for...of loop with a concurrent Promise.all mapping in the useIconRegistry.ts hook's exportIconsForYAML function. Added inline code comments to explain the optimization.

🎯 Why:
The previous implementation processed fileToBase64 conversions sequentially, blocking execution for each file. This is an I/O bound task that can be effectively parallelized to drastically reduce the total wait time when dealing with multiple icons.

📊 Impact:
Wait time is decoupled. Rather than O(N) wait time, it reduces latency towards O(1) as all base64 reader calls execute concurrently. Memory/CPU usage will be slightly more peaked during parallel execution, but total operation time will be significantly reduced for multiple files.

🔬 Measurement:
A custom test measuring performance on 5-10 icons being exported to YAML should show reduced total time compared to a sequential wait block execution.

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PR created automatically by Jules for task 7347780638239694315 started by @aafre

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[gemini-code-assist]

Code Review

This pull request refactors the icon export logic in useIconRegistry.ts to process file conversions concurrently using Promise.all, which improves performance for I/O-bound tasks. The feedback suggests a more idiomatic implementation using Object.fromEntries to avoid mutating an external object within the concurrent map, while also improving type safety and data preservation.

[gemini-code-assist]

While the parallelization is a great performance improvement, the current implementation relies on side-effects by mutating the exportData object from within concurrent promises. A more idiomatic and maintainable approach is to use Promise.all to return the transformed data and then assemble the final object using Object.fromEntries. Additionally, ensure all original properties are preserved during transformation to prevent accidental data loss (Rule 4), and use unknown instead of any for better type safety (Rule 5).

    const exportEntries = await Promise.all(
      targetFilenames.map(async (filename) => {
        const entry = registry[filename];
        if (!entry) return null;

        try {
          const base64Data = await fileToBase64(entry.file);
          return [
            filename,
            {
              ...entry,
              data: base64Data,
              type: entry.file.type,
              size: entry.file.size,
              uploadedAt: entry.uploadedAt.toISOString(),
            },
          ];
        } catch (error) {
          console.warn("Failed to export icon " + filename + ":", error);
          return null;
        }
      })
    );

    const exportData: IconExportData = Object.fromEntries(
      exportEntries.filter((entry): entry is [string, unknown] => entry !== null)
    );

References

1. When transforming data objects, preserve all original properties by default to prevent accidental data loss, rather than hardcoding for an expected schema.
2. When handling data from external sources, prefer using the unknown type over any to enforce type-checking and improve type safety.

[aafre]

Closing: superseded by #421 (cleanest version). Cherry-picked into #457.

[google-labs-jules]

Closing: superseded by #421 (cleanest version). Cherry-picked into #457.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.