How I cut my OpenAI Agent latency by replacing cloud sandboxes with a local microVM

A few days ago, I was building a coding agent using the new OpenAI Agents SDK. Like everyone else, I plugged in one of the official cloud sandboxes (I won't name names, they are all generally good). My agent was working, but it felt incredibly sluggish. I looked at the logs. My agent was averaging about 15 tool calls per task. Because the sandbox was hosted in the cloud, the physical path looked like this: My Agent Runtime → Internet → Cloud Sandbox → MicroVM → Internet → My Agent Runtime Every