[Tarantool-patches] [PATCH v3 0/2] Encapsulate MEM type changing and checking
Vladislav Shpilevoy
v.shpilevoy at tarantool.org
Sun Feb 28 20:35:39 MSK 2021
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.
> 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(-)
>
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