In reply to Lisandro Colantonio.

I suspect you don't need to use the BCa at all. You do not say what statistic you are computing, but for n=10,000 you can probably use asymptotic formulas (when they exist) for the CIs instead of the bootstrap. If you don't have asymptotic formulas, it could still be the case that the Central Limit Theorem applies and your bootstrap distribution is approximately normal. If so, you don't need the BCa adjustment. When the bias=0 and the acceleration=0, then the BCa interval reduces to the bootstrap percentile interval.

Lastly, consider drawing a random sample of a smaller size (such as n=2500?) and running the BCa algorithm on the reduced sample. If the BCa and the percentile intervals are close, then you probably don't need the BCa.