| Kepler: C++ "hello world" build takes a long time [message #1099185] |
Sun, 01 September 2013 08:59  |
 Joost Kraaijeveld
Messages: 273
Registered: July 2009 |
Senior Member |
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Hi,
Building the "Hello world" C++ takes > 21 seconds (see below) the first
time or any other time any (empty) function is added. An ordinary
recompile after that (e.g. a "clean" followed by a "build") takes only
122 ms. A rebuild of the index of the same program takes ~ 2.5 seconds
(from the error log, see below).
Why does it take so long? What is Eclipse doing (as indexing only takes
~ 2.5 seconds)? And last but not least, what can I do to improve the
performance?
TIA
Joost
////////////////////////////////
10:30:41 **** Build of configuration Debug for project HelloWorldC++ ****
make all
Building file: ../src/HelloWorldC++.cpp
Invoking: GCC C++ Compiler
g++ -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP
-MF"src/HelloWorldC++.d" -MT"src/HelloWorldC++.d" -o
"src/HelloWorldC++.o" "../src/HelloWorldC++.cpp"
distcc[8462] (dcc_parse_hosts) Warning: /home/jkr/.distcc/zeroconf/hosts
contained no hosts; can't distribute work
distcc[8462] (dcc_zeroconf_add_hosts) CRITICAL! failed to parse host file.
distcc[8462] (dcc_build_somewhere) Warning: failed to distribute,
running locally instead
Finished building: ../src/HelloWorldC++.cpp
Building target: HelloWorldC++
Invoking: GCC C++ Linker
g++ -o "HelloWorldC++" ./src/HelloWorldC++.o
Finished building target: HelloWorldC++
10:31:02 Build Finished (took 21s.158ms)
////////////////////////////////
eclipse.buildId=4.3.0.I20130605-2000
java.version=1.6.0_27
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_GB
Framework arguments: -product org.eclipse.epp.package.standard.product
Command-line arguments: -os linux -ws gtk -arch x86_64 -product
org.eclipse.epp.package.standard.product -data
/home/jkr/HAN/Workspaces/CAR-2013-9/ESAD
Info
Sun Sep 01 10:43:08 CEST 2013
Indexed 'HelloWorldC++' (1 sources, 134 headers) in 2.54 sec: 11,029
declarations; 17,988 references; 0 unresolved inclusions; 2 syntax
errors; 2 unresolved names (0.01%)
Cheers,
Joost
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| Re: Kepler: C++ "hello world" build takes a long time [message #1100088 is a reply to message #1099899] |
Mon, 02 September 2013 16:51  |
Joost Kraaijeveld
Messages: 273
Registered: July 2009 |
Senior Member |
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On 02-09-13 13:09, Axel Mueller wrote:
> Quote:
>> distcc[8462] (dcc_parse_hosts) Warning:
>> /home/jkr/.distcc/zeroconf/hosts contained no hosts; can't distribute
>> work
>> distcc[8462] (dcc_zeroconf_add_hosts) CRITICAL! failed to parse host
>> file.
>>
>> distcc[8462] (dcc_build_somewhere) Warning: failed to distribute,
>
> Is this the cause of the delay?
No, it is not. It happens also when not using distcc. The delay is
after "Finished building target: HelloWorldC++ " appeared.
Joost
Cheers,
Joost
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