Faster common header handling

[benaadams]

No description provided.

[halter73]

Spelling. Fix commit message too.

[benaadams]

This word seems to haunt me for some reason

[halter73]

I chatted w/ @jkotas, and he suggested this could be simplified to:

static bool initializer;

public static void InitializeJitConstants()
{
     initializer = BitConverter.IsLittleEndian;
}

All static fields of a class get initialized at once.

He also suggested it's better to avoid static variables altogether. This could probably be achieved by making Constants non-static and referencing the singleton instance using a property in ServiceContext. I think we should probably do this instead, so we don't need to worry about static initialization order.

[halter73]

Are the two commits in this PR related? Does one require the other?

[benaadams]

Yea, was just looking at that - I think it was because it was related to the earlier commit that was in here; will split again.

[benaadams]

Removed other PR

[halter73]

Given the extra complexity this adds for the relatively small performance improvement, I'm not very inclined to merge this PR.

[halter73]

This is really cool, but a little much for a 1% perf gain.