Extension causes 10-15 second lock up on solution context menu

[mip1983]

Installed product versions

• Visual Studio: 2015 Professional 14.0.25422.01 Update 3
• Image Optimizer 3.6.89 (installed with the web extension pack)

Description

Visual studio hangs (often with 'not responding' at the top of the window) for 10-15 seconds on the right-click context menu in solution explorer and 15-20 seconds on the 'Image optimizer' menu. It is a very large solution with a lot of projects (not sure if that's related to the amount of delay).

Steps to recreate

1. Enable the 'Image Optimizer' extension.
2. Right click on the solution in solution explorer.
3. After recoving from the initial 10-15 second hang with VS not responding, if you go to the 'Image optimizer' context menu item, it also hangs if you click this item for 15-20 seconds before the sub menu appears.

Current behavior

Visual studio now hangs (often with 'not responding' at the top of the window) for 10-15 seconds on solution explorer context menu and 15-20 seconds on the 'Image optimizer' menu as described above.

Expected behavior

Not hanging, context menu loads instantaneously with no delay after right click.

[mvaneijk]

I can confirm this issue. I have a solution with 9 C++ projects. Often, the context-menu does not open.