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StartOptimizedLoad() Method

Summary

Start optimized page loading for the same source image file or document in this RasterCodecs object.

Syntax
C#
VB
C++
public void StartOptimizedLoad() 
Public Sub StartOptimizedLoad() 
public:  
   void StartOptimizedLoad() 
Remarks

Optimizes getting information, loading or conversion from a file with multiple pages. Call this method before a loop that involves loading from the same source file or stream. Call StopOptimizedLoad when finished.

This method should be used only if the source file is the same and its contents is unchanged.

This method can greatly speed up a loop involving multiple GetInformation, GetInformationAsync, Load, LoadAsync, or Convert) methods for certain formats (for example, TXT, DOCX, and PDF files).

For more information, refer to Using the OptimizedLoad Functions to Speed Loading Large Files.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void OptimizedLoadExample() 
{ 
	using (RasterCodecs codecs = new RasterCodecs()) 
	{ 
		// The speed improvement is most noticeable in source files with many pages 
		string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "MultiPage.pdf"); 
 
		// indicate the start of a loop from the same source file 
		codecs.StartOptimizedLoad(); 
 
		for (int i = 1; i < 10; i++) 
		{ 
			using (RasterImage image = codecs.Load(srcFileName, i)) 
			{ 
				string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "out_" + i.ToString() + ".jpg"); 
				// Save as the destination image 
				codecs.Save(image, destFileName, RasterImageFormat.Jpeg411, 24); 
			} 
		} 
 
		// Indicate that I finished using the same source file. 
		codecs.StopOptimizedLoad(); 
	} 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
} 
Requirements
Target Platforms
Help Version 21.0.2021.3.3
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Leadtools.Codecs Assembly