[gujun720]

Good points. I want to add one more.

I think the Ann benchmark should pay more attention on

1. The index building speed, as this is very important in some production scenarios. Now it only says I will give 5 hours to build the index on that 1 million vectors.

2. The memory footprint, as 1m vectors are not that many. We will have to deal with billion s of vectors for chemical molecules, images and word vectors. The memory consumption will definitely impact how many servers you need.