Set breakpoints on lines 13 and 16 of the test code below. Run in debug mode, first the breakpoint is triggered at line 13:
Open Chrome Developer Tools, click the Profiles tab, then click the button "Take Snapshot":
Generate a Snapshot with ID 3:
Continue to execute the code in debug mode to line 16 and click the button "Take heap snapshot" to generate the second snapshot. Select "Objects allocated between Snapshot 3 and Snapshot 4" from the drop-down menu:
Use the variable name "arra" as a filter in the Summary below to find the variable arra with the highest memory usage between snapshot3 and snapshot4:
Hover over arra to see what this variable contains:
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