tree 5fd1e7e01c4d05efe6344da37d2f7e94dcf0ce10
parent 084f72a2f639a72a1ec8694a3caf1f14c6ba9f26
author Paul J. Davis <paul.joseph.davis@gmail.com> 1504881652 -0500
committer Paul J. Davis <paul.joseph.davis@gmail.com> 1505163396 -0500

Optimize compactor to use multi-IO API

This updates couch_db_updater to use the new multi-IO API functions
(append_terms/pread_terms) in couch_file. This optimization benefits us
by no longer requiring the `couch_emsort:merge/1` step to copy
`#full_doc_info{}` records multiple times while also not being penalized
by signficantly increasing the number of calls through couch_file APIs.