performance

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Finding the shortest path in a graph between 2 nodes that goes through a subset of nodes

I\'m trying to find out an efficient way of finding the shortest path between 2 开发者_开发问答nodes in a graph with positive edge costs that goes trough a subset of nodes.[详细]

2023-04-11 20:00 分类：问答
SQL Server Performance: Delete/Insert Vs Select/Update

I have a very large database, little over 60 gigs, with many tables with millions of rows.I am getting some timeout errors, so I am rethinking some of my code design.[详细]

2023-04-11 19:31 分类：问答
How can I speed up my Ruby/Rake task, which counts occurrences of dates among 300K date strings?

I have an array of 300K strings which represent dates: date_array = [ \"2007-03-25 14:24:29\", \"2007-03-25 14:27:00\",[详细]

2023-04-11 17:41 分类：问答
WPF Performance issue with Unmanaged objects

I have developed an application in WPF with C#. The application includes a third party dll for displaying the camera in a particular window.[详细]

2023-04-11 17:13 分类：问答
How to force numpy array order to fortran style?

I am using quite a lot of fortran libraries to do some mathematical computation. So all the arrays in numpy need to be Fortran-contiguous.[详细]

2023-04-11 17:01 分类：问答
Is this method of building dynamic SQL vulnerable to SQL injection or bad for performance?

I would like to build a safe dynamic select statement that can handle multiple WHERE clauses. For example the base SQL would look like:[详细]

2023-04-11 14:40 分类：问答
How to debug the performance of a wrong setup of a build machine?

We have to setup new build environments regularily, and the process seems not so simple. Today I have got a new build machine, and the first Maven build was so slow, that I wanted to clarify why the p[详细]

2023-04-11 14:11 分类：问答
Efficient evaluation of a function at every cell of a NumPy array

Given a NumPy array A, what is the fastest/most effic开发者_运维知识库ient way to apply the same function, f, to every cell?[详细]

2023-04-11 13:12 分类：问答
high performance virtual CPU - brainstorming + feedback?

i\'m thinking to code a virtual CPU for the Linux kernel that basically decides when it is a good idea to execute a thread or a process in another machine. any feedback or ideas are highly welcome.[详细]

2023-04-11 12:50 分类：问答
Large SQL dataset query using java

I have the following configuration: SQL Server 2008 Java as backend technology - Spring + Hibernate Basically what I want to do is a select with a where clause on a table. The problem is the tabl[详细]

2023-04-11 12:32 分类：问答