[GitHub] couchdb-couch issue #228: Couchdb 3298 improve couch btree chunkify

[iilyak <gi...@git.apache.org>]

Github user iilyak commented on the issue:

    https://github.com/apache/couchdb-couch/pull/228
  
    Tested manually with the following:
    ```
    LL = couch_btree:chunkify(
       [{list_to_binary(couch_util:to_hex(crypto:rand_bytes(10))), binary:copy(<<"x">>, 1300)}
           || _ <- lists:seq(1, 10)]).
    length(LL).
    
     Generator = fun(Size, N) ->
       [{list_to_binary(couch_util:to_hex(crypto:rand_bytes(10))), binary:copy(<<"x">>, Size)}
          || _ <- lists:seq(1, N)]
     end.
    
     LL = couch_btree:chunkify(Generator(1300, 3)).
     [Last | _] = lists:reverse(LL).
     [{"Number of chunks", length(LL)}, {"Elements in last chunk", length(Last)}].
    ```
    
    The output without this change is:
    ```
    [
      {"Number of chunks",5},
      {"Elements in last chunk",2}
    ]
    ```
    
    The output with this change is:
    ```
    [
      {"Number of chunks",1},
      {"Elements in last chunk",3}
    ]
    ```
    
    +1.


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