Caching reports is a great technique to improve the performance of report rendering and is extremely beneficial for large reports with an infrequent change of data, like periodic reports that generate monthly or weekly.

The Js Viewer backends read a report as many times as required. However, sometimes you may need to cache the report as demonstrated in the example below.

var cache = new MemoryCache(new MemoryCacheOptions { SizeLimit = 10000 });
settings.UseCustomStore(reportId =>
    cache.GetOrCreate(reportId, entry =>
    {
        entry.SetSlidingExpiration(TimeSpan.FromSeconds(30));
        return new PageReport(new FileInfo(Path.Combine(@"C:\Reports", reportId)));
    });