electron/docs/api/structures/memory-info.md

MemoryInfo Object

• pid Integer - Process id of the process.
• workingSetSize Integer - The amount of memory currently pinned to actual physical RAM.
• peakWorkingSetSize Integer - The maximum amount of memory that has ever been pinned to actual physical RAM. On macOS its value will always be 0.
• privateBytes Integer - The amount of memory not shared by other processes, such as JS heap or HTML content.
• sharedBytes Integer - The amount of memory shared between processes, typically memory consumed by the Electron code itself

Note that all statistics are reported in Kilobytes.