⚡ Bolt: Cache color map per status line render

[himattm]

💡 What: The optimization implements map caching via sync.Once for colors.ColorMap() within the StatusLine struct.
🎯 Why: colors.ColorMap() is called on every plugin render, and without caching, it allocates a new map instance for each call. Given plugins are rendered often and concurrently, this produces unnecessary garbage collection overhead and consumes CPU cycles.
📊 Impact: Expected to reduce execution time of fetching colors from ~4300 ns to ~3 ns per call according to benchmark. This significantly minimizes memory allocations during statusline re-renders and reduces latency, leading to a snappier terminal experience.
🔬 Measurement: Verify improvements via benchmarking color fetching latency using go test -bench=BenchmarkColorMapAllocation.

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PR created automatically by Jules for task 15510301899690530652 started by @himattm

[google-labs-jules]

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[gemini-code-assist]

Code Review

This pull request optimizes the StatusLine renderer by caching the color map at the instance level using sync.Once, which significantly reduces allocations during plugin execution. A review comment suggests adding a documentation warning to the getColors method to ensure callers do not mutate the shared map reference, thereby preventing potential side effects across plugin executions.

[gemini-code-assist]

The getColors method returns a shared reference to the cached map. Since maps in Go are mutable, any modification by a caller (e.g., a native plugin) would persist across all subsequent plugin executions and status line renders. While returning a reference is necessary for the performance gains described, it introduces a risk of side effects. Consider adding a comment to the getColors method documenting that the map should be treated as read-only.

Suggested change

	func (sl *StatusLine) getColors() map[string]string {
	sl.colorMapOnce.Do(func() {
	sl.colorMap = colors.ColorMap()
	})
	return sl.colorMap
	}
	func (sl *StatusLine) getColors() map[string]string {
	// Note: Returns a shared reference. Callers must not mutate the returned map.
	sl.colorMapOnce.Do(func() {
	sl.colorMap = colors.ColorMap()
	})
	return sl.colorMap
	}

[himattm]

Closing as superseded by direct commit 42f3149 on main, which consolidated the StatusLine color-map caching optimization without the generated .jules note.

[google-labs-jules]

Closing as superseded by direct commit 42f3149 on main, which consolidated the StatusLine color-map caching optimization without the generated .jules note.

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