Guid तेज होना चाहिए, क्योंकि तुलना सरल है - केवल कुछ प्रत्यक्ष बाइट्स। स्ट्रिंग में एक अव्यवस्था और बहुत अधिक काम शामिल है।
बेशक
- आप ;-p प्रोफ़ाइल सकता
साक्ष्य:
Searching for 7f9b349f-f36f-94de-ad96-04279ddf6ecf
As guid: 466; -1018643328
As string: 512; -1018643328
Searching for 870ba465-08f2-c872-cfc9-b3cc1ffa09de
As guid: 470; 1047183104
As string: 589; 1047183104
Searching for d2376f8a-b8c9-4633-ee8e-9679bb30f918
As guid: 423; 1841649088
As string: 493; 1841649088
Searching for 599889e8-d5fd-3618-4c4f-cb620e6f81bb
As guid: 488; -589561792
As string: 493; -589561792
Searching for fb64821e-c541-45f4-0fd6-1c772189dadf
As guid: 450; 1389733504
As string: 511; 1389733504
Searching for 798b9fe5-ba15-2753-357a-7637161ee48a
As guid: 415; 779298176
As string: 504; 779298176
Searching for 12ba292e-8e59-e5d0-7d04-e811a237dc21
As guid: 457; 558250944
As string: 564; 558250944
Searching for 05b3ce14-dfbf-4d3a-1503-ced515decb81
As guid: 413; 1658205056
As string: 504; 1658205056
Searching for 8db4a556-0a65-d8cb-4d0d-0104245d18b8
As guid: 415; 696231936
As string: 506; 696231936
Searching for c49cf80c-5537-fba5-eebd-8ad21bba09c4
As guid: 459; 2100976384
As string: 557; 2100976384
के आधार पर:
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
static class Program
{
static void Main()
{
Random rand = new Random(123456);
int COUNT = 1000;
Dictionary<Guid, int> guids = new Dictionary<Guid, int>(COUNT);
Dictionary<string, int> strings = new Dictionary<string, int>(
COUNT, StringComparer.Ordinal);
byte[] buffer = new byte[16];
for (int i = 0; i < COUNT; i++)
{
rand.NextBytes(buffer);
Guid guid = new Guid(buffer);
int val = rand.Next();
guids.Add(guid, val);
strings.Add(guid.ToString(), val);
}
for(int i = 0 ; i < 10 ; i++) {
int index = rand.Next(COUNT);
Guid guid = guids.Keys.Skip(index).First();
Console.WriteLine("Searching for " + guid);
int chk = 0;
const int LOOP = 5000000;
Stopwatch watch = Stopwatch.StartNew();
for (int j = 0; j < LOOP; j++)
{
chk += guids[guid];
}
watch.Stop();
Console.WriteLine("As guid: " + watch.ElapsedMilliseconds
+ "; " + chk);
string key = guid.ToString();
chk = 0;
watch = Stopwatch.StartNew();
for (int j = 0; j < LOOP; j++)
{
chk += strings[key];
}
watch.Stop();
Console.WriteLine("As string: " + watch.ElapsedMilliseconds
+ "; " + chk);
}
Console.ReadLine();
}
}
स्रोत
2009-04-03 08:57:41
ओह, आप मेरे लिए यह नहीं करेंगे?;) – Benjol
वाह, आपने किया! जवाब तुम्हारा है, महोदय! – Benjol
मुस्कुराहट के साथ सेवा; -पी –