This may be an obvious question but can you explain what the timings represent? I'm assuming they represent some message size, perhaps incorrectly.
Also, can you explain the difference between the last two timings on the Stax run so that we can understand the big jump?
Sorry about the confusion. I've re-done the test and hopefully this will be clearer and give more accurate results. Please disregard my previous post.
I'll create a wiki page for this so that we can edit it if required. I'll post back with a link to the wiki page.