UtcNow
If you compare dates in your site without showing those dates to the visitor, DateTime.UtcNow is a lot faster than DateTime.Now.
Take this code, which compares against DateTime.Now 1000 times:
DateTime dt = DateTime.Now;
for (int i = 0; i < 1000; i++)
{
DateTime dt2 = DateTime.Now;
bool b = (dt2 > dt);
}
The equivalent using UtcNow is as follows:
DateTime dtu = DateTime.UtcNow;
for (int i = 0; i < 1000; i++)
{
DateTime dtu2 = DateTime.UtcNow;
bool b = (dtu2 > dtu);
}
Here is how they compare on my machine:
|
Test |
Time taken (ticks) |
|---|---|
|
1000 * Now |
3964 |
|
1000 * UtcNow |
136 |
