interface Deno.MemoryUsagePropertiesrss: numberThe number of bytes of the current Deno's process resident set size, which is the amount of memory occupied in main memory (RAM). heapTotal: numberThe total size of the heap for V8, in bytes. heapUsed: numberThe amount of the heap used for V8, in bytes. external: numberMemory, in bytes, associated with JavaScript objects outside of the JavaScript isolate.