Yes, you need to account for that, and potentially make the decision that you should investigate targeting a different engine as the one you develop against. Yo

Yes, you need to account for that, and potentially make the decision that you should investigate targeting a different engine as the one you develop against. Your infrastructure should absolutely not be set in stone, and this includes looking at different compilers, different javascript engines, and different operating systems. If the most straightforward way of writing your code involves lots of try/catch blocks, then it sounds reasonable that you should target an engine that provides better speed for try/catch blocks.