⚡ Bolt: [performance improvement] optimize sequential db queries

[bobdivx]

💡 What: Replaced three independent sequential db.select() operations in src/pages/api/agent-budget.ts with a single concurrent Promise.all().

🎯 Why: To avoid unnecessary I/O bottleneck waiting time when querying database tables that do not depend on each other.

📊 Impact: Reduces the total query execution time to the duration of the longest query, rather than the sum of all three queries.

🔬 Measurement: Verifiable via API request timing to /api/agent-budget or reviewing database query logs. Added a journal entry in .jules/bolt.md.

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PR created automatically by Jules for task 467754568389280079 started by @bobdivx

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Project	Deployment	Actions	Updated (UTC)
forge	Ready	Preview, Comment	May 24, 2026 5:37pm

[gemini-code-assist]

Code Review

This pull request optimizes the agent-budget API endpoint by executing database queries concurrently using Promise.all and adds a performance optimization note to the documentation. Feedback suggests further improving efficiency by selecting only required columns to avoid fetching large unused fields, considering SQL aggregations for better scalability, and removing tool-specific branding from code comments.

[gemini-code-assist]

While using Promise.all is a correct optimization for concurrency, the queries themselves still fetch all columns from the database.

1. Efficiency: AgentInstruction contains a systemPrompt field which can be very large and is not used in this endpoint. Similarly, CostEvent fetches several unused columns. Selecting only the required columns will significantly reduce memory usage and network overhead.
2. Scalability: Fetching all rows from CostEvent will eventually lead to performance issues as the table grows. For future improvement, consider using SQL aggregations (SUM, COUNT) and filtering by date (occurredAt) directly in the query instead of processing everything in JavaScript.
3. Style: Consider removing the tool-specific branding (⚡ Bolt:) from the comment to maintain a standard, clean codebase.

Suggested change

	// ⚡ Bolt: Concurrent query execution to avoid sequential I/O bottlenecks
	const [budgets, allEvents, instructions] = await Promise.all([
	db.select().from(AgentBudget),
	db.select().from(CostEvent),
	db.select().from(AgentInstruction),
	]);
	// Fetch data concurrently to reduce total I/O wait time
	const [budgets, allEvents, instructions] = await Promise.all([
	db.select().from(AgentBudget),
	db.select({
	agentId: CostEvent.agentId,
	costCents: CostEvent.costCents,
	inputTokens: CostEvent.inputTokens,
	outputTokens: CostEvent.outputTokens,
	occurredAt: CostEvent.occurredAt,
	}).from(CostEvent),
	db.select({
	agentId: AgentInstruction.agentId,
	model: AgentInstruction.model,
	}).from(AgentInstruction),
	]);