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How to detect idle time in JavaScript elegantly?
...ls the function, rather than letting it sit idle by.
It doesn't catch zero CPU usage directly, but that is impossible, because executing a function causes CPU usage. And user inactivity eventually leads to zero CPU usage, so indirectly it does catch zero CPU usage.
...
Bill Gross超火爆演讲: 创业成功唯一最关键因素 - 资讯 - 清泛网 - 专注C/C++及内核技术
...业组织这么伟大，为什么他们中绝大部分都会失败？这个问题，是我想知道的，我希望找出真正能影响它们成功的关键性因素，而且，我想尝试用一种系统化的方式研究，以避免我一些直觉性的东西，以及因为过去经历我曾操盘...
How can I check if a Perl array contains a particular value?
...grep, hash...
any: 0 wallclock secs ( 0.67 usr + 0.00 sys = 0.67 CPU) @ 149253.73/s (n=100000)
first: 1 wallclock secs ( 0.63 usr + 0.01 sys = 0.64 CPU) @ 156250.00/s (n=100000)
grep: 42 wallclock secs (41.95 usr + 0.08 sys = 42.03 CPU) @ 2379.25/s (n=100000)
hash: 0 ...
Why is address zero used for the null pointer?
...
@GMan - You are correct. On early CPUs, memory address zero was special and had hardware protection against access from running software (in some cases it was the start of the reset vector, and modifying it could prevent the CPU from resetting or starting up)...
Difference between a theta join, equijoin and natural join
...0000
Component(PName, CName, Cost)
=============================
Laptop, CPU, 500
Laptop, hdd, 300
Laptop, case, 700
Car, wheels, 1000
The Cartesian product Product x Component will be - bellow or sql fiddle. You can see there are 12 rows = 3 x 4. Obviously, rows like "Laptop" with "w...
Go > operators
...me extra work when the shift count is a number.
Shift instructions in x86 CPUs consider only 5 bits (6 bits on 64-bit x86 CPUs) of the shift count. In languages like C/C++, the shift operator translates into a single CPU instruction.
The following Go code
x := 10
y := uint(1025) // A big shift c...
What are bitwise shift (bit-shift) operators and how do they work?
...rs of magnitude faster when it comes down to the low level operations of a CPU, a good optimizing compiler would do the exact opposite, that is, turning ordinary multiplications by powers of two into bit shifts.
– Mahn
Jun 14 '13 at 11:45
...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
....
@echo off
setlocal
del /q /f %temp%\timestampfile_*
Logman.exe stop ts-CPU 1>nul 2>&1
Logman.exe delete ts-CPU 1>nul 2>&1
Logman.exe create counter ts-CPU -sc 2 -v mmddhhmm -max 250 -c "\Processor(_Total)\%% Processor Time" -o %temp%\timestampfile_ >nul
Logman.exe start ...
TypeLoadException says 'no implementation', but it is implemented
...
I had this error too, it was caused by an Any CPU exe referencing Any CPU assemblies that in turn referenced an x86 assembly.
The exception complained about a method on a class in MyApp.Implementations (Any CPU), which derived MyApp.Interfaces (Any CPU), but in fuslogv...
Nginx缓存解决方案：SRCache - 更多技术 - 清泛网 - 专注C/C++及内核技术
...多的时候，冗余的浪费将非常严重，此外还有数据一致性问题，所以它只是一个粗线条的解决方案。
对此类问题而言，SRCache是一个细粒度的解决方案。其工作原理大致如下：
SRCache工作原理
当问题比较简单的时候，通常SRC...