Improve the efficiency of trace stitching

From the way benchmarks have been responding to recent PRs, it certainly seems like side exits could be made more efficient, especially in the happy path. This is especially true of _DYNAMIC_EXIT, which needs to do quite a bit of work for a successful stitch... perhaps the best option here is to just reduce the number of _DYNAMIC_EXITs that we run.

This could also include recompiling stitched traces together into the same executor to essentially remove stitching overhead, too.

Linked PRs

• gh-122295

L’issue ne mentionne ni fichiers ni tests. Commencez par examiner les réponses des benchmarks et le chemin de trace-stitching autour de _DYNAMIC_EXIT ; déterminez s’il est viable de réduire les dynamic exits ou de recompiler les stitched traces. Le travail est considéré comme terminé lorsqu’une réduction de l’overhead de stitching est démontrée sur les benchmarks concernés.