Expand description
Packed bitmask — one bit per row, 64-bit words.
The bitmask is the foundation of virtual-frame’s zero-copy filtering. A million-row filter costs 122 KB of bitmask memory. The original data stays untouched. Chained filters AND their bitmasks together — still no data copied, still 122 KB.
Structs§
- BitMask
- Packed bitmask over N rows. One bit per row, stored in 64-bit words.
Functions§
- nwords_
for - Compute the number of u64 words needed for
nrowsbits.