--without-threads implications on preformance

[magick]

AcquireSemaphore() is light-weight. There is a fair bit of overhead when starting ImageMagick so if you have a short quick task the start-up costs are high. The start-up cost becomes negligible for longer running tasks.

You can initalize any of the ImageMagick lists before threading is enabled by calling the Get????Info("*",exception) method for the list. For example, to preload the type configuration list, call

• GetTypeInfo("*",exception);

before you fire up threads. However, without threading enabled in ImageMagick, it will probably blow up at some point if you fire multiple threads, perhaps when the program is exiting.