Merge pull request #9214 from electron/app-memoryinfo

API to get memory of all processes of the app

docs/api/app.md

@@ -760,6 +760,10 @@ Disables hardware acceleration for current app.
 
 This method can only be called before app is ready.
 
+### `app.getAppMemoryInfo()`
+
+Returns [ProcessMemoryInfo[]](structures/process-memory-info.md):  Array of `ProcessMemoryInfo` objects that correspond to memory usage statistics of all the processes associated with the app.
+
 ### `app.setBadgeCount(count)` _Linux_ _macOS_
 
 * `count` Integer

docs/api/structures/memory-info.md

@@ -0,0 +1,12 @@
+# MemoryInfo Object
+
+* `workingSetSize` 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.
+* `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.

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

@@ -0,0 +1,4 @@
+# ProcessMemoryInfo Object
+
+* `pid` Integer - Process id of the process.
+* `memory` [MemoryInfo](memory-info.md) - Memory information of the process.