Configure sandbox memory
Deno Sandboxes provide a sandboxed environment for evaluating JavaScript code. This is useful for evaluating code that is not trusted or for testing code that is not safe to run in the main runtime.
You can customize the amount of memory allocated to your sandbox using the memoryMb option. This allows you to allocate more resources for memory-intensive workloads or reduce memory for lighter tasks.
import { Sandbox } from "@deno/sandbox";
// Create a sandbox with 1GB of memory
await using sandbox = await Sandbox.create({ memoryMb: 1024 });
import { Sandbox } from "@deno/sandbox";
// Create a sandbox with 4GB of memory for memory-intensive workloads
await using sandbox = await Sandbox.create({ memoryMb: 4096 });
// Check available memory
const memInfo = await sandbox.eval<{ total: number }>(
"Deno.systemMemoryInfo()",
);
console.log("Total memory:", memInfo.total);
Memory limits (may change in the future):
- Minimum: 768MB
- Maximum: 4096MB
The actual available memory inside the sandbox may be slightly less than the configured value due to system overhead.
Want to allocate more memory? Contact deploy@deno.com.
For more information about Sandboxes, see the Sandboxes documentation.