Jiaming Yuan 54da4b3185
Cleanup to prepare for using mmap pointer in external memory. (#9317)
- Update SparseDMatrix comment.
- Use a pointer in the bitfield. We will replace the `std::vector<bool>` in `ColumnMatrix` with bitfield.
- Clean up the page source. The timer is removed as it's inaccurate once we swap the mmap pointer into the page.
2023-06-22 06:43:11 +08:00
..
2023-03-03 13:47:04 -08:00
2022-09-21 18:06:50 +08:00
2023-03-01 00:39:06 +08:00
2020-08-12 01:26:02 -07:00