# Question about glfw.dll size

**URL:** <https://discourse.glfw.org/t/question-about-glfw-dll-size/340>\
**Category:** support\
**Created:** [May 24, 2005, 1:20am UTC](https://discourse.glfw.org/t/question-about-glfw-dll-size/340 "2005-05-24T01:20:20Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [May 24, 2005, 1:20am UTC](https://discourse.glfw.org/t/question-about-glfw-dll-size/340/1 "2005-05-24T01:20:20Z")

</div>

**nobody** wrote on [Tuesday, May 24, 2005](https://sourceforge.net/p/glfw/discussion/247562/thread/8b6a868c/#94ea):

Hi, there  
I use glfw v2.5 and I find two glfw.dll.  
One is a \lib\win32\glfw.dll another is a \support\win32dll.  
Why different size each other?

---

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [May 28, 2005, 2:37pm UTC](https://discourse.glfw.org/t/question-about-glfw-dll-size/340/2 "2005-05-28T14:37:35Z")

</div>

**[epsilondelta](https://sourceforge.net/u/epsilondelta/)** wrote on [Saturday, May 28, 2005](https://sourceforge.net/p/glfw/discussion/247562/thread/8b6a868c/#94ea/4910):

I noticed this too. It seems to have something to do with which compiler is used to create the dll. For example, I found mingw gcc and openwatcom both create different dll sizes; these dll’s are much larger than the one included with the project. I also found that there’s a difference in frame rate depending on which dll is used. I don’t know why, but one compiler seems to create a dll that runs at almost half the speed of the other. I can’t remember which one does that, though.