Commits on Apr 9, 2021

1. Make compaction available for Oj::Doc …

   Introduce compaction to `fast.c`, only if `rb_gc_mark_movable` is
   available. Otherwise, keep a version that supports ruby <2.7.
   
   Since `rb_data_object_wrap` and `TypedData_Wrap_Struct` is available
   in every supported versions (eg >=2.4.10), I've also removed support
   for earlier versions.
   
   Result for compaction is great. I've tested it by allocating and
   removing arbitrary sized json. For a count of 70 pages, we can see
   that we used to need 68 pages after compaction,and now 61 pages. Of
   course this test include also lots of noise, but if we count pinned
   objects (objects that are marked in C extension as uncollectible),
   we can see that for a benchmark with no allocations, we have the
   same amount as a benchmark with this commit with thousands of allocations
   (499 pinned objects total), and before this, `Oj::Doc` used to generate
   5k more objects (5499 pinned objects total).
   
   Hence this is a win, see ohler55#650 for a graphical result.
   
   Signed-off-by: Ulysse Buonomo <buonomo.ulysse@gmail.com>

   

   BuonOmo committed Apr 9, 2021
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2. Change clang-format -> .clang-format …

   According to clang's documentation:
   
   > When using `-style=file`, **clang-format** for each input file will
   > try to find the `.clang-format` file located in the closest parent
   > directory of the input file. When the standard input is used, the
   > search is started from the current directory.
   
   Hence the `.clang-format` seems more appropriate
   
   Signed-off-by: Ulysse Buonomo <buonomo.ulysse@gmail.com>

   

   BuonOmo committed Apr 9, 2021
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