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Performance optimization strategies of last resort [closed]
...y under a broad range of scenarios, and perform null checks on parameters, etc. By re-implementing a method you may be able to strip out a lot of logic that does not apply in the exact circumstance you are using it.
Down-sides: writing additional code means more surface area for bugs.
Do use library...
How do I get Windows to go as fast as Linux for compiling C++?
...is by looking at the differences between the two compilers, build systems, etc etc.
– surfasb
Dec 20 '11 at 1:24
Windo...
Why is reading lines from stdin much slower in C++ than Python?
...lly timing the execution of cat, not your benchmark. The 'user' and 'sys' CPU usage displayed by time are those of cat, not your benchmarked program. Even worse, the 'real' time is also not necessarily accurate. Depending on the implementation of cat and of pipelines in your local OS, it is possib...
What is “vectorization”?
...GE
Vectorization describes the absence of any explicit looping, indexing, etc., in the code - these things are taking place, of course, just “behind the scenes” in optimized, pre-compiled C code. Vectorized code has many advantages, among which are:
vectorized code is more concise and easier ...
What are the file limits in Git (number and size)?
... if they are called frequently by the web front-end to GitLab/Stash/GitHub etc then they can become bottlenecks. (e.g. 'git branch --contains' seems terribly adversely affected by large numbers of branches.)
git-blame could be slow when a file is modified a lot.
...
python-pandas and databases like mysql
...SQLdb.connect(host='myhost',
port=3306,user='myusername', passwd='mypassword',
db='information_schema')
df_mysql = pd.read_sql('select * from VIEWS;', con=mysql_cn)
print 'loaded dataframe from MySQL. records:', len(df_mysql)
mysql_cn.close()
...
How to export and import a .sql file from command line with options? [duplicate]
... check and confirm: grant all privileges on *.* to root@"%" identified by "Passwd";
ERROR 2006 (HY000) at line 866: MySQL server has gone away
mysqldump: Got errno 32 on write
# set this values big enough on destination mysql server, like: max_allowed_packet=1024*1024*20
# use compress parameter ...
“An attempt was made to load a program with an incorrect format” even when the platforms are the sam
...been unchecked for my executable, so it was still running with the old Any CPU build. After I fixed that, Visual Studio complained that it couldn't debug the assembly, but that was fixed with a restart.
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解决：CTreeCtrl控件SetCheck无效的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
解决：CTreeCtrl控件SetCheck无效的问题解决方法：SetCheck之前或OnInitDialog中添加如下两句代码m_tree.ModifyStyle( TVS_CHECKBOXES, 0 );m_tree.ModifyStyle( 0, TVS_CHEC...解决方法：SetCheck之前或OnInitDialog中添加如下两句代码
m_tree.ModifyStyle( TVS_CHECKBOXES,...
What Every Programmer Should Know About Memory?
...spend the time reading the manuals about details about the actual timings, etc. But for people interested in the HW low level stuff? Maybe not useful, but at least entertaining.
– Voo
Nov 14 '11 at 18:52
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