⚡ Parallelize sequential KV operations in src/index.ts

[catoncat]

⚡ Performance Optimization: Parallelize sequential KV operations

💡 What:

Optimized Cloudflare KV storage operations in src/index.ts by replacing sequential await calls with Promise.all. This change affects:

• handleCreate: Concurrent write of content and metadata.
• handleEdit: Concurrent write of updated content and metadata.
• handleAbuseReport: Concurrent update of abuse counter and deduplication key.
• handleSubdomain: Concurrent fetch of metadata and content for both the /edit view and standard note serving.

🎯 Why:

Sequential asynchronous I/O operations like env.NOTES.put or env.NOTES.get block the execution of the Worker handler until each completes. By parallelizing independent operations, we leverage the asynchronous nature of the environment to perform these tasks concurrently, significantly reducing the "wall-clock" time spent on I/O and thus improving the overall responsiveness of the service.

📊 Measured Improvement:

Establishment of a baseline and post-change measurement was attempted via test/perf.test.ts. However, due to the current environment configuration (missing vitest binary and network restrictions preventing npm install), the tests could not be executed. Despite this, parallelizing I/O is a standard and highly effective optimization for Cloudflare Workers, typically yielding a latency reduction roughly equal to the time of the slowest parallelized call, effectively halving the I/O wait time in cases where two sequential calls were converted to parallel ones.

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PR created automatically by Jules for task 1836528330768438476 started by @catoncat

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Summary by cubic

Parallelized Cloudflare KV reads/writes in src/index.ts using Promise.all to cut I/O wait time and speed up handlers. This reduces latency for create/edit flows, edit view loads, standard note serving, and abuse report processing.

• Refactors

  • Replaced sequential env.NOTES.get/put calls with Promise.all in handleCreate, handleEdit, handleAbuseReport, and subdomain paths.
  • Fetch and write content + metadata concurrently, respecting existing TTL options.

• New Features

  • Added perf baseline harness in test/perf.test.ts using vitest.

^{Written for commit 0b24d8f. Summary will update on new commits. Review in cubic}

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