[Tarantool-patches] [PATCH v3 0/2] Encapsulate MEM type changing and checking

[Mergen Imeev]

Hi! Thank you for the review. My answer below. I already sent you a new
version.

On Sun, Feb 28, 2021 at 06:35:39PM +0100, Vladislav Shpilevoy wrote:
> Hi! Thanks for the patchset!
> 
> On 20.02.2021 17:59, Mergen Imeev via Tarantool-patches wrote:
> > This patch-set is part of issue #5818. It changes the way to check and change
> > MEM from outside. However, there is almost no changes in functions that work
> > with internal structure of MEM, most of which located in vdbemem.c. This will be
> > done in another patch-set.
> > 
> > https://github.com/tarantool/tarantool/issues/5818
> > https://github.com/tarantool/tarantool/tree/imeevma/gh-5818-encapsulate-mem-type-checking-and-changing
> > 
> > Changes in v3:
> >   - Inlined most of the introduced functions to improve performance.
> >   - Some other fixes in code to improve performance.
> 
> How is this patch related to performance? Isn't it called 'encapsulate'? Not
> 'optimize'.
> 
> Or did the non-inlined approach make the performance worse than it is on the
> master branch? I see that on the master branch things like mem_set_... are
> not inlined and all is fine.
> 
> I have no issues with optimizing it a bit, as long as it does not involve
> doing extra actions and does not complicate the code even more. And is not
> motivated by introduction of a perf issue in a different place.
> 
> My main concern to the patchset is why do we still have Mem in that scattered
> all over the other source files? Can it be extracted into a new file sql/mem.h
> and .c? With proper API, separated into public and private.
> 
Done. I moved all MEM-related functions to sql/mem.c ans sqm/mem.h. Rewrote some
functions and wrote some new functions.

> > Changes in v2:
> >   - Squashed almost all patches.
> >   - Review fixes.
> > 
> > Mergen Imeev (2):
> >   sql: Initialize MEM in sqlVdbeAllocUnpackedRecord()
> >   sql: Encapsulate MEM type changing and checking
> > 
> >  src/box/sql/func.c      |  14 +-
> >  src/box/sql/sqlInt.h    |   1 -
> >  src/box/sql/vdbe.c      | 513 ++++++++++++++++++----------------------
> >  src/box/sql/vdbeInt.h   | 465 +++++++++++++++++++++++++++++++++---
> >  src/box/sql/vdbeapi.c   |  57 ++---
> >  src/box/sql/vdbeaux.c   | 360 ++++++++++++++--------------
> >  src/box/sql/vdbemem.c   | 146 +-----------
> >  src/box/sql/vdbesort.c  |   9 +-
> >  src/box/sql/vdbetrace.c |  12 +-
> >  9 files changed, 874 insertions(+), 703 deletions(-)
> >