currentUsage

number

Current memory usage in bytes

initialUsage

number

Initial memory usage when tracking started

jsHeapSize?

number

(Optional) JavaScript heap size (if available)

memoryGrowth

number

Memory growth since start

peakUsage

number

Peak memory usage in bytes

totalJSHeapSizeLimit?

number

(Optional) Total JavaScript heap size limit (if available)

usedJSHeapSize?

number

(Optional) Used JavaScript heap size (if available)