Hi All,

�� I should write a blog post on this, but I can't wait...

In recent days I've written a script to build a Cog VMMaker image from Squeak 4.5. ��See��http://www.squeakvm.org/svn/squeak/branches/Cog/image. ��This has allowed me to run the current Cog VM against Spur side-to-side.

To build a Cog VMMaker image on my 2.2GHz Intel Core i7 MacBook Pro using the current Cog VM takes about 2 and a half minutes:

McStalker.image$ time oscfvm CogVMMaker.image BuildSqueak45Image.st��

real �� 2m30.671s

user �� 2m15.683s

sys �� 0m5.283s

To build the equivalent image using Spur takes about 1 and a half minutes:

McStalker.image$ time spurcfvm CogVMMaker-spur.image BuildSqueak45Image.st��

real �� 1m34.943s

user �� 1m23.666s

sys �� 0m6.810s

Comparing:

94.943 - 150.671 / 150.671 * 100 -36.99

83.666 - 135.681 / 135.681 * 100 -38.34

150.671 / 94.943 1.59

135.681 / 83.666 1.62

that's about a -37% speedup, or 1.6x faster.

--
best,

Eliot