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Is there any performance gain in indexing a boolean field?
...if there are relatively few records of one value. For example, if you have 1000 records and 10 of them are TRUE, then it would be useful if you searching with isok = 1
As Michael Durrant mentioned, it also makes writes slower.
EDIT: Possible duplication: Indexing boolean fields
Here it explains t...
Set cURL to use local virtual hosts
...
+100
Does the server actually get the requests, and are you handling the host name (alias) properly?
after adding to my .hosts file
...
How to move git repository with all branches from bitbucket to github?
... use the this method to copy a repo because it contained a large file (>100MB). GH wouldn't allow large files in their repos. I removed the large file before pushing the repo to GH. However, barring other problems, using GH's "Import repository" feature is the right choice 95% of the time, as ...
Assign one struct to another in C
... are problems:
struct S {
char * p;
};
struct S s1, s2;
s1.p = malloc(100);
s2 = s1;
Now the pointers of both structs point to the same block of memory - the compiler does not copy the pointed to data. It is now difficult to know which struct instance owns the data. This is why C++ invented t...
Fastest way to check if a file exist using standard C++/C++11/C?
...
Well I threw together a test program that ran each of these methods 100,000 times, half on files that existed and half on files that didn't.
#include <sys/stat.h>
#include <unistd.h>
#include <string>
#include <fstream>
inline bool exists_test0 (const std::string&...
How to benchmark efficiency of PHP script
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+100
To benchmark how fast your complete script runs on the server, there are plenty of tools you can use. First make sure your script (p...
What is routes.IgnoreRoute(“{resource}.axd/{*pathInfo}”)
...ller.
Read link:
http://msdn.microsoft.com/en-us/library/cc668201%28v=vs.100%29.aspx
You can also specify that routing should not handle certain URL requests. You prevent routing from handling certain requests by defining a route and specifying that the StopRoutingHandler class should be used ...
What is JavaScript's highest integer value that a number can go to without losing precision?
...ach the end of that for loop in a sane timeframe, you may wish to say i += 1000000000
– ninjagecko
Jul 8 '15 at 20:18
2
...
Constant Amortized Time
...g all money from previous room, but can only fit only 1 more money.
After 100 times, the new room fits 100 count of money from previous and 1 more money it can accommodate. This is O(N), since O(N+1) is O(N), that is, the degree of 100 or 101 is same, both are hundreds, as opposed to previous story...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...。该参数值以10 ms为单位，监控超时值可以从最小值10（100 ms）到3200（32.0 s）。超时必须大于有效的连接间隔。
3.4.3 有效连接间隔Effective Connection Interval有效连接间隔等于两个连接事件之间的时间跨度，假设从机跳过最大数量...