When you complete optimizing, it's useful to see what progress you've made. The comparison mode lets you easily see the difference between two profile sessions. You can continue to view data as a Call Tree or a Table, but instead of absolute time values, you see time differences.
For example, you can compare two profiles to evaluate results before and after function optimization. In Compare mode, each column shows the change in values compared to the other session. Time and Count columns show the new value minus the old value. If there's no new value match for an item, its old value is used. If no old value match exists, the item will have a + indicator beside the new value.
Comparing two profiler sessions.
In this case, you must have at least two Application Profiler sessions to compare.
To profile in this case, follow these steps:
View the changes based on the results of the Comparison mode.
After you profile
The Execution Time view shows the difference between two selected sessions, and you can observe these differences by: