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Executing periodic actions in Python [duplicate]
...foo (1421705503.5810)
Note that this example includes a simulation of the cpu doing something else for .3 seconds each period. If you changed it to be random each time it wouldn't matter. The max in the yield line serves to protect sleep from negative numbers in case the function being called takes...
Minimal web server using netcat
...ces:
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 314 18 78 0 0 2 1 306 31 0 0 100 0
Addresses:
eth0 Link encap:Ethernet HWaddr b8:27:eb:...
Unable to load SOS in WinDbg
...nging to get both on my system, since the latest installers autodetect the CPU type. Is there an override flag that you know of for the msi? I'm going to install an old 32bit version of WinDbg, but don't know what to expect.
– Dave
Dec 21 '10 at 7:51
...
What's the difference between `1L` and `1`?
... large vectors, that's less wasted memory and less to wade through for the CPU (so it's typically faster).
Mostly this applies when working with indices.
Here's an example where adding 1 to an integer vector turns it into a double vector:
x <- 1:100
typeof(x) # integer
y <- x+1
typeof(y) # ...
iPhone Data Usage Tracking/Monitoring
... mach_absolute_time is not uptime. It is roughly the amount of time the CPU has been active. mach_absolute_time mostly stops counting when the device sleeps.
– Bob Whiteman
Oct 26 '15 at 20:26
...
What is the difference between using IDisposable vs a destructor in C#?
...ent but were abandoned without unsubscribing, that could cause a memory or CPU leak (since the time required to process each subscription would increase).
– supercat
May 18 '15 at 16:35
...
String.Replace ignoring case
...nsensitive way to replace all values.
Advantages of this method:
High CPU and MEMORY efficiency;
It is the fastest solution, 2.5 times faster than other's methods
with regular expressions (proof in the end);
Suitable for removing parts from the input string (set newValue to
null), optimized for...
Is there a library function for Root mean square error (RMSE) in python?
...i-gigabyte sized libraries; requiring 3 to 20 minute Network download then CPU full-tilt installs, when all you really need is about 3 lines of code that fits in 400 bytes. If you ask for a library for a job that can be compressed into a 1 line of code, that's about 90 characters wide, then you're ...
When to use enumerateObjectsUsingBlock vs. for
...ly faster, but that doesn't matter much in most cases — few programs are CPU-bound, and even then it's rare that the loop itself rather than the computation inside will be a bottleneck.
A simple loop also reads more clearly. Here's the boilerplate of the two versions:
for (id x in y){
}
[y enum...
关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...程来处理的 IO 模型，但是效率相对比较差，也很容易出问题，所以暂时不做介绍了）。在这些多路复用的模式中，异步阻塞/非阻塞模式的扩展性和性能最好。
引入阻塞/非阻塞,、同步/异步比喻很形象的一段话：
有A，B，C，D...