ns/batch-fsync (Mon Apr 4, 2022)

> * ns/batch-fsync (2022-03-30) 14 commits
>  - core.fsyncmethod: performance tests for batch mode
>  - t/perf: add iteration setup mechanism to perf-lib
>  - core.fsyncmethod: tests for batch mode
>  - test-lib-functions: add parsing helpers for ls-files and ls-tree
>  - core.fsync: use batch mode and sync loose objects by default on Windows
>  - unpack-objects: use the bulk-checkin infrastructure
>  - update-index: use the bulk-checkin infrastructure
>  - builtin/add: add ODB transaction around add_files_to_cache
>  - cache-tree: use ODB transaction around writing a tree
>  - core.fsyncmethod: batched disk flushes for loose-objects
>  - object-file: pass filename to fsync_or_die
>  - bulk-checkin: rebrand plug/unplug APIs as 'odb transactions'
>  - bulk-checkin: rename 'state' variable and separate 'plugged' boolean
>  - Merge branch 'ns/core-fsyncmethod' into ns/batch-fsync
> 
>  Introduce a filesystem-dependent mechanism to optimize the way the
>  bits for many loose object files are ensured to hit the disk
>  platter.
> 
>  Will merge to 'next'?
>  source: <pull.1134.v5.git.1648616734.gitgitgadget@gmail.com>