https://bugs.kde.org/show_bug.cgi?id=371018
Bug ID: 371018
Summary: CPP parser responds very slow after user action
Product: kdevelop
Version: 5.0.2
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Language Support: CPP (Clang-based)
Assignee: [email protected]
Reporter: [email protected]
CPP parser responds in couple seconds for helper tool or for simple commenting
line.
For example
applying comment:for one line in file (~30kb) from:
- my project takes about 3 seconds
- kdevelop takes about 4 seconds
Similar time I get for helper tool. I need to wait couple seconds! This is not
much comfortable behavior comparing to my hardware (check end this report).
In my opinion this is serious regression comparing to kdevelop-4.7.x, where
application responds in less than 1 second.
I tested kdevelp-4.7.3 on Mageia 5 distribution where all are working on Sandy
Bridge i5-2410M
Reproducible: Always
Steps to Reproduce:
1. Open project kdevelop
2. Wait till kdevduchain cache finishes its building
3. Open file following file:
kdevelop-git/src/kdevelop/projectmanagers/cmake/cmakemanager.cpp
4. Jump to line: 193
In my version of kdevelop source this points to inside of loop for function:
CMakeManager::targets(). Please check below all function:
QList<KDevelop::ProjectTargetItem*> CMakeManager::targets() const
{
QList<KDevelop::ProjectTargetItem*> ret;
foreach(IProject* p, m_projects.keys())
{
ret+=p->projectItem()->targetList();
}
return ret;
}
I comment line starting with: "ret+="
Actual Results:
need to wait at least 3 seconds for applying comment (changing color this line)
Expected Results:
applying comment (changing color this line) should take less than 1 seconds (at
least on processor compared to i5 Sandy Bridge / Ivy Bridge).
My hardware is following: SkyLake i7-6700 + SSD m4 Crucial 128GB. I observe the
same behavior (the need of waiting couple seconds on respond) on Sandy Bridge
i5-2410M + HDD.
My settings for "Background parser" are following:
- checked: "Enabled Background Parser"
- Delay: 500ms
- Maximum Number of threads
My settings for "Clang Language Support" are following:
all checked, so:
- Add macros to code-completion
- Enable Look-ahead code-completion
- Forward declare assistant
I tested on version (day of build: 2016/10/17):
kdevplatform-git-debug-5.0.2.r13464
kdevelop-git-debug-5.0.2.r23476
Running environment: Plasma 5.8.1, Qt-5.7.0, KF-5.27, kernel 4.7.6-1-ARCH
x86_64
Distribution Antergos (up-to-date).
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