. Net 4.0 Parallel Library practicality Walkthrough

Since VS2010 released nearly half a year, although all day want to learn new things, to update themselves, found that the original oneself is basically also very lazy, 2008 not how long it is useless, helpless by 2010. In a few days, the IDE looks like 05, 08 almost, added small features, later slowly experience it, the first feeling of slow start. The main or. Net 4.0 changes, in fact, is tinkering, language features almost no new features, C # More dynamic, a decade ago, VB support late binding. Instead of focusing on the framework, the new parallel support should be the biggest change.

VS2010 conference I have also been to, parallel support is a big selling point. At that time, I remember a mm on the stage adds a asparallel () to a LINQ query statement, and the performance is magically raised by one, and applause is made. It's really fun to improve the performance of the program. In the reading of electronic periodicals, see cold students, and Wu Qin of the article, give me these rookie to shock the inspiration, originally I have fallen far behind in reading college students.

Then start to learn, take parallel axe. First grab a cushion back:

static void Set (int length) {var array = new Int[length, length, length]; for (int i = 0; i < length; i++) for (int j = 0; ; Length; J + + for (int k = 0; k < length; k++) Array[i, j, K] = System.Threading.Thread.CurrentThread.ManagedThreadId; }

And then ask the true God:

static void Parallelset (int length) {var array = new Int[length, length, length]; Parallel.For (0, length, I => {for (int j = 0; J < length; J +) for (int k = 0; k < length; k++) Array[i, j, K] = system.th Reading. Thread.CurrentThread.ManagedThreadId; }); }

PK:

Codetimer.time ("Single Thread", () => Set (100)); Codetimer.time ("ListBox Thread", () => parallelset (100));

As a result, 1136ms:729ms, really good. But the MSDN example might have been harmonized, so I always change the test process. Sure enough to find another.

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