大约有 37,000 项符合查询结果（耗时：0.0321秒） [XML]
SQL Server Management Studio, how to get execution time down to milliseconds
...hing like this in your Messages window:
SQL Server Execution Times: CPU time = 6 ms, elapsed time = 6 ms.
share
|
improve this answer
|
follow
|
...
php中0,null,empty,空,false,字符串关系详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...y,空,false,字符串关系详解在一个项目中遇到了一个奇怪的问题，耗费了我不少时间都没有解决，最终调试发现是判断的问题—-关于0和 ‘ ‘ (空单引号,为好...在一个项目中遇到了一个奇怪的问题，耗费了我不少时间都没有...
SQL SELECT speed int vs varchar
...... obviously non-float are smaller than strings and floats, and thus more CPU friendly in assembly.
String to string comparison in all languages is slower than something that can be compared in 1 instruction by the CPU. Even comparing 8 byte (64bit) on a 32bit CPU is still faster than a VARCHAR(2)...
Get program execution time in the shell
...] PIPELINE
Execute PIPELINE and print a summary of the real time, user CPU time,
and system CPU time spent executing PIPELINE when it terminates.
The return status is the return status of PIPELINE. The `-p' option
prints the timing summary in a slightly different format. This uses
...
Scanner vs. StringTokenizer vs. String.Split
... faster than any of two viz. StringTokenizer or String.split.
But the CPU utilization for all the three is nearly the same. So we also need a method which is less CPU intensive, which I am still not able to find.
share...
How can I test a Windows DLL file to determine if it is 32 bit or 64 bit? [duplicate]
...programs, regardless of whether they are compiled for x32 or x32/x64 ("All CPU"). Appears as if every .NET executable has a 32-bit native header, and it calls the appropriate 32-bit or 64-bit .NET runtime when its invoked.
– Contango
Mar 2 '11 at 12:16
...
Assembly code vs Machine code vs Object code?
...ine code is binary (1's and 0's) code that can be executed directly by the CPU. If you were to open a machine code file in a text editor you would see garbage, including unprintable characters (no, not those unprintable characters ;) ).
Object code is a portion of machine code not yet linked into a ...
What is the difference between concurrency, parallelism and asynchronous methods?
..., which means that it processes multiple sub-tasks of a task in multi-core CPU at same time.
An application can be neither parallel – nor concurrent, which means that it processes all tasks one at a time, sequentially.
An application can be both parallel – and concurrent, which means that it p...
fastest (low latency) method for Inter Process Communication between Java and C/C++
...e send/received,
2 Java processes just spawned, without assigning specific CPU cores with taskset:
TCP - 25 microseconds
Named pipes - 15 microseconds
Now explicitly specifying core masks, like taskset 1 java Srv or taskset 2 java Cli:
TCP, same cores: 30 microsecond...
Context switches much slower in new linux kernels
...ance problem in recent kernels has to do with the switch to the intel_idle cpuidle driver from acpi_idle, the driver used in older kernels. Sadly, the intel_idle driver ignores the user's BIOS configuration for the C-states and dances to its own tune. In other words, even if you completely disable a...