V3 MCP Optimization

Reduce MCP startup time by pre-warming the connection pool, pre-building the tool index before accepting requests, and deferring non-critical initialization. This approach targets under 400ms startup compared to roughly 1.8 seconds for unoptimized servers.

Implement a ConnectionPool class that stores pooled connections with last-used timestamps, usage counts, and health flags. Reuse healthy connections per endpoint, evict least-recently-used entries at capacity, and retire connections after a maximum usage count.

Use a hash-based Map index for O(1) exact-name lookup instead of linear search, backed by an LRU cache for frequently used tools. Add a fuzzy matcher for typo-tolerant name resolution and a category index for grouped retrieval.

Least-connections routing sends requests to the server with the fewest active connections, while response-time selection favors the fastest instance. A weighted strategy combines load, latency, and tool-category affinity into a single server score.

Slow lookup happens when the registry performs linear O(n) scans across hundreds of tools per request. Precompiling a name index, category index, and fuzzy variation map at startup reduces lookup to under 5ms.

Track request latency percentiles (p50, p95, p99), error rate, connection pool hit rate, tool lookup time, and memory usage. Alert when response time exceeds 200ms, error rate exceeds 5%, or pool hit rate drops below 70%.