Example.cs

using System.Collections;
using System.Diagnostics;
using UnityEngine;
using UnityEngine.UI;

internal sealed class Example : MonoBehaviour
{
    public Text m_versionText;
    public Text m_text;

    public int m_count = 1000;

    private IEnumerator Start()
    {
        m_versionText.text = Application.unityVersion;

        var path = $"{Application.streamingAssetsPath}/AssetBundles/texturebundle";

        var sw = Stopwatch.StartNew();

        for ( var i = 0; i < m_count; i++ )
        {
            var assetBundleRequest = AssetBundle.LoadFromFileAsync( path );

            yield return assetBundleRequest;

            var assetBundle = assetBundleRequest.assetBundle;
            var assetAsync  = assetBundle.LoadAssetAsync<Texture2D>( "Assets/texture.png" );

            yield return assetAsync;
            
            assetBundle.Unload( true );
        }

        sw.Stop();

        m_text.text = $"{sw.Elapsed.TotalSeconds:0.0 秒}";
    }
}