Fast Converting RenderTexture to Texture2D

Questions & Answers
1

I have a screenshot preview at the end of the game’s level.
When I am loading the screenshot, it makes game freeze for a moment.
What shall I do, so there would be no freeze, when I am loading that screenshot?
Here is mycode:

private IEnumerator ShowScreeshotPreview()
        {
    screenshotTexture = new Texture2D(Screen.height, Screen.height, TextureFormat.RGB24, false);
            for (int i = 0; i < 9; i++)
            {
                yield return null;
            }
            RenderTexture.active = Singletons.Get<SpecialEffectsHelper>().MainCharacterScript.GetComponent<GeneratorScript>().screenshotTexture;
            screenshotTexture.ReadPixels(new Rect(0, 0, Screen.height, Screen.height), 0, 0);
    screenshotTexture.Apply();
            RenderTexture.active = null; //Added to avoid errors
    
            screenshotPrview.mainTexture = screenshotTexture;
    ScreenshotPreviewAnimator.SetBool("visible", true);
            screenshotLoaded = true;
    
            yield return null;
        }
2

“screenshotTexture.ReadPixels(new Rect(0, 0, Screen.height, Screen.height), 0, 0);
screenshotTexture.Apply();”

it is not fast, It takes a lot of time and Influence performance
Is there a new way to solve the problem?