Re: [Boost-users] [serialization] Runtime overhead of serialization archives

Subject: Re: [Boost-users] [serialization] Runtime overhead of serialization archives
From: Ernest Zaslavsky (ernest.zaslavsky_at_[hidden])
Date: 2016-09-25 00:08:08

>> Run on (8 X 2195 MHz CPU s)
>> 2016-09-23 00:00:29
>> ***WARNING*** Library was built as DEBUG. Timings may be affected.

Looks like you are comparing release version with debug hence the gap

-----Original Message-----
From: Boost-users [mailto:boost-users-bounces_at_[hidden]] On Behalf Of Georg Gast
Sent: Friday, September 23, 2016 1:04 AM
To: boost-users_at_[hidden]
Subject: Re: [Boost-users] [serialization] Runtime overhead of serialization archives

>> Without global set locale:
>> Benchmark       Time(ns)    CPU(ns) Iterations
>> ----------------------------------------------
>> to_wire_xml        78066      77177       7479
>> from_wire_xml      95638      95949       7479
>>
>> With global set locale:
>> 09/22/16 08:32:49
>> Benchmark       Time(ns)    CPU(ns) Iterations
>> ----------------------------------------------
>> to_wire_xml        41399      41302      16619
>> from_wire_xml      52841      52844      11218
>>
>> Thats amazing! Thats the Level of the Linux implementation.
>>
>> One riddle is solved :)
>>
>>
>
> After fiddling around on linux with clang 3.8 and gcc optimizer 
> options i got down to this. With gcc and -O3.
>
> Benchmark          Time(ns)    CPU(ns) Iterations
> -------------------------------------------------
> to_wire_xml           11174      11178     381818
> to_wire_text           5148       5149     820313
> to_wire_binary         3327       3330    1141304
> to_wire_cstyle           63         63   65217391
> from_wire_xml         27170      27183     155096
> from_wire_text         5371       5370     783582
> from_wire_binary       3226       3228    1296296
> from_wire_cstyle         45         45   93750000
>
> This results look very nice. <6µs for serilize/deserialize a structure 
> to a portable text archive seems very nice :)
>
> Now is the difference again pretty big compared to windows .....
>
Now i installed msys2 on Win10 and compiled boost/benchmark and the testsuite with gcc 5.3.0 and i got these results

Run on (8 X 2195 MHz CPU s)
2016-09-23 00:00:29
***WARNING*** Library was built as DEBUG. Timings may be affected.
Benchmark          Time(ns)    CPU(ns) Iterations
-------------------------------------------------
to_wire_xml           17304      17274      40698
to_wire_text          10769      10917      74468
to_wire_binary         7244       7310      89744
to_wire_cstyle          168        165    4069767
from_wire_xml         75807      75725       8861
from_wire_text        10217      10273      74468
from_wire_binary       7254       7308     111111
from_wire_cstyle        166        165    4069767

The compiler or its support libraries are definitly an issue.

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