LLM Gateway Latency Overheads Are Negligible, Developer Finds

A developer spent a month meticulously benchmarking LLM gateway latency, only to discover that the gateway's contribution to overall request time was negligible, often less than 1%. The actual performance bottlenecks lie in model selection, intelligent routing, caching, and prompt optimization, with model choice having the most significant impact. The author argues that focusing on microsecond-level gateway overhead is misplaced when the LLM inference itself takes orders of magnitude longer. AI

IMPACT Focusing on model selection, routing, and prompt optimization offers greater latency improvements than micro-optimizing LLM gateways.

RANK_REASON Developer's personal blog post analyzing LLM infrastructure performance.

Read on dev.to — LLM tag →

• ailatency.com
• Artificial Analysis
• Claude Sonnet 4 20250514
• Gemini 2.5 Flash
• Gemini 2.5 Pro
• GPT-4o
• GPT-4o mini
• Kubernetes
• LiteLLM

• infra
• product

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