Hi
Thanks for advice. I will check this on DevTools. Right now quick grep
search in library src files shows, that there are pthread header
included in several files.
Should I add -pthread flag for compilation of my code? Should i
recompile libraries with -pthread flag?
Regards
Adam
W dniu 28.01.2021 o 00:09, 'Thomas Lively' via emscripten-discuss pisze:
Ok, thanks for verifying. I'm not familiar with the libraries you're
using. Do they use SIMD or multithreading in the native versions? That
could be a source of large slowdowns if you're not using those
features in the WebAssembly version. You also might want to profile
your application in Chrome's DevTools to see where it is spending its
time and compare that to a profile of the native build.
On Wed, Jan 27, 2021 at 1:22 PM Adam Wnęk <[email protected]
<mailto:[email protected]>> wrote:
Hi,
I have checked once again. My previous snapshot from make output
was without optimization indeed (different configuration)
Right one looks like that:
/home/adam/Temp/emsdk/upstream/emscripten/em++
-DOCC_CONVERT_SIGNALS
@CMakeFiles/cadModelConverter.dir/includes_CXX.rsp -s WASM=1 -s
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CMakeFiles/cadModelConverter.dir/fileconverter.cpp.o -c
/home/adam/projects/EmscriptenProjects/CadModelConverter/fileconverter.cpp
/home/adam/Temp/emsdk/upstream/emscripten/em++
-DOCC_CONVERT_SIGNALS
@CMakeFiles/cadModelConverter.dir/includes_CXX.rsp -s WASM=1 -s
ALLOW_MEMORY_GROWTH=1 -DNDEBUG -O2 -std=gnu++11 -o
CMakeFiles/cadModelConverter.dir/main.cpp.o -c
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/home/adam/Temp/emsdk/upstream/emscripten/em++
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FORCE_FILESYSTEM=1 @CMakeFiles/cadModelConverter.dir/objects1.rsp
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Performance is more or less the same.
Regards
Adam
W dniu 26.01.2021 o 22:28, 'Thomas Lively' via emscripten-discuss
pisze:
Do you see those optimization flags being used in the verbose
make output? For example, in the output in your original message,
you have
/home/adam/Temp/emsdk/upstream/emscripten/em++
-I/home/adam/projects/EmscriptenProjects/CadModelConverter
-I/home/adam/Temp/instal/OCCT_emsdk/include/opencascade -s
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CMakeFiles/cadModelConverter.dir/fileconverter.cpp.o -c
/home/adam/projects/EmscriptenProjects/CadModelConverter/fileconverter.cpp
Clearly some flags like " -s WASM=1 -s ALLOW_MEMORY_GROWTH=1" are
being used, but I would have expected to see optimization flags
here as well.
On Tue, Jan 26, 2021 at 1:22 PM Adam Wnęk <[email protected]
<mailto:[email protected]>> wrote:
Hi Thomas,
I'm using -O3 right now. There was no substantial difference
between this and -O2
Adam
W dniu 26.01.2021 o 18:56, 'Thomas Lively' via
emscripten-discuss pisze:
Hi Adam,
I don't see any optimization flags used in your Make output.
Does compiling with `-O2` or `-O3` make a difference?
Thomas
On Tue, Jan 26, 2021 at 8:17 AM Adam Wnęk
<[email protected] <mailto:[email protected]>> wrote:
Hi
I have small application converting files from IGES to
VRML format. Im using OPENCASCADE librariesto do so.
After compilation in emscripten application works but it
is much slower than the same code complied using
"normal" compilation.
Processing one file takes several seconds then while
doing the same in browser using wasm module takes
several minutes.
In wasm module source file is saved in FS system than
loaded and processed. output data is send back to JS by
value::typed_memory_view. OPENCASCADE (static) libraries
are compiled with emscripten too.
What may be the cause of such huge performance drop? Im
stuck there a bit.
Build platform :Ubuntu
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------------------------------------------------------------------------------------------------------------
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"/home/adam/Temp/emsdk/upstream/emscripten/system/include/wasm32-emscripten"
#include "..." search starts here:
#include <...> search starts here:
/home/adam/projects/EmscriptenProjects/CadModelConverter
/home/adam/Temp/instal/OCCT_emsdk/include/opencascade
/home/adam/Temp/emsdk/upstream/emscripten/system/include/SDL
/home/adam/Temp/emsdk/upstream/emscripten/cache/wasm/include
/home/adam/Temp/emsdk/upstream/emscripten/system/include/libcxx
/home/adam/Temp/emsdk/upstream/emscripten/system/lib/libcxxabi/include
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[ 80%] Linking CXX executable cadModelConverter
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/home/adam/Temp/instal/OCCT_emsdk/lib/libTKGeomBase.a
/home/adam/Temp/instal/OCCT_emsdk/lib/libTKG3d.a
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-mllvm -combiner-global-alias-analysis=false -mllvm
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cadModelConverter.wasm -o cadModelConverter.wasm
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/home/adam/Temp/emsdk/upstream/emscripten/src/compiler.js
/tmp/tmpc39q3j3t.txt
make[2]: Leaving directory
'/home/adam/projects/EmscriptenProjects/CadModelConverter/build'
[100%] Built target cadModelConverter
make[1]: Leaving directory
'/home/adam/projects/EmscriptenProjects/CadModelConverter/build'
/usr/bin/cmake -E cmake_progress_start
/home/adam/projects/EmscriptenProjects/CadModelConverter/build/CMakeFiles
0
*** Finished ***
---------------------------------------------------------------------------------------
Thanks in advance for any suggestions.
Regards
Adam Wnek
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