NPOI export excel performance test

Intro

Internet see a lot of people say that the performance of NPOI's not that he wrote a NPOI extensions, so what would happen to want to try to look at the performance of NPOI, hearsay is always better to try it yourself.

test environment

test tools:

BenchmarkDotNet v0.11.5
EPPlus.Core.Extensions v2.3.2
EPPlus v4.5.3.1

Test code :( Github source )

[SimpleJob(launchCount: 1, warmupCount: 1, targetCount: 5)]
[MemoryDiagnoser]
[MinColumn, MaxColumn, MeanColumn, MedianColumn]
public class WorkbookBasicTest
{
    private const int ColsCount = 10;

    [Params(10000, 30000, 50000, 65535)]
    public int RowsCount;

    [Benchmark(Baseline = true)]
    public byte[] NpoiXlsWorkbookInit()
    {
        var workbook = ExcelHelper.PrepareWorkbook(ExcelFormat.Xls);

        var sheet = workbook.CreateSheet("tempSheet");

        for (var i = 0; i < RowsCount; i++)
        {
            var row = sheet.CreateRow(i);
            for (var j = 0; j < ColsCount; j++)
            {
                var cell = row.CreateCell(j);
                cell.SetCellValue($"as ({i}, {j}) sa");
            }
        }

        return workbook.ToExcelBytes();
    }

    [Benchmark]
    [MethodImpl(MethodImplOptions.NoInlining)]
    public byte[] NpoiXlsxWorkbookInit()
    {
        var workbook = ExcelHelper.PrepareWorkbook(ExcelFormat.Xlsx);

        var sheet = workbook.CreateSheet("tempSheet");

        for (var i = 0; i < RowsCount; i++)
        {
            var row = sheet.CreateRow(i);
            for (var j = 0; j < ColsCount; j++)
            {
                var cell = row.CreateCell(j);
                cell.SetCellValue($"as ({i}, {j}) sa");
            }
        }

        return workbook.ToExcelBytes();
    }

    [Benchmark]
    [MethodImpl(MethodImplOptions.NoInlining)]
    public byte[] EpplusWorkbookInit()
    {
        var excel = new ExcelPackage();

        var sheet = excel.Workbook.Worksheets.Add("tempSheet");

        for (var i = 1; i <= RowsCount; i++)
        {
            for (var j = 1; j <= ColsCount; j++)
            {
                sheet.Cells[i, j].Value = $"as ({i}, {j}) sa";
            }
        }

        return excel.GetAsByteArray();
    }
}

Test Results

View results on Github https://github.com/WeihanLi/WeihanLi.Npoi/blob/dev/perf/WeihanLi.Npoi.Benchmark/BenchmarkDotNet.Artifacts/results/WeihanLi.Npoi.Benchmark.WorkbookBasicTest-report-github.md


BenchmarkDotNet=v0.11.5, OS=Windows 10.0.18362
Intel Core i5-3470 CPU 3.20GHz (Ivy Bridge), 1 CPU, 4 logical and 4 physical cores
.NET Core SDK=3.0.100
  [Host]     : .NET Core 2.2.6 (CoreCLR 4.6.27817.03, CoreFX 4.6.27818.02), 64bit RyuJIT
  Job-CBYTBY : .NET Core 2.2.6 (CoreCLR 4.6.27817.03, CoreFX 4.6.27818.02), 64bit RyuJIT

IterationCount=5  LaunchCount=1  WarmupCount=1

Method	RowsCount	Mean	Error	StdDev	me	Max	Median	Ratio	RatioSD	Gen 0	Gen 1	Gen 2	Allocated
NpoiXlsWorkbookInit	10000	324.7 ms	1.583 ms	0.4110 ms	324.3 ms	325.4 ms	324.6 ms	1.00	0.00	10000.0000	5000.0000	2000.0000	78.6 MB
NpoiXlsxWorkbookInit	10000	1,369.0 ms	73.747 ms	19.1517 ms	1,341.3 ms	1,384.4 ms	1,381.1 ms	4.22	0.06	57000.0000	14000.0000	4000.0000	306.45 MB
EpplusWorkbookInit	10000	552.9 ms	12.740 ms	3.3085 ms	549.7 ms	557.7 ms	552.4 ms	1.70	0.01	18000.0000	7000.0000	3000.0000	121.05 MB

NpoiXlsWorkbookInit	30000	1,222.4 ms	33.717 ms	8.7562 ms	1,209.0 ms	1,233.1 ms	1,222.5 ms	1.00	0.00	29000.0000	11000.0000	3000.0000	235.03 MB
NpoiXlsxWorkbookInit	30000	4,226.2 ms	299.833 ms	77.8658 ms	4,109.5 ms	4,308.6 ms	4,257.2 ms	3.46	0.08	174000.0000	34000.0000	6000.0000	913.9 MB
EpplusWorkbookInit	30000	1,695.4 ms	31.751 ms	8.2457 ms	1,686.3 ms	1,706.5 ms	1,694.2 ms	1.39	0.02	48000.0000	17000.0000	5000.0000	358.51 MB

NpoiXlsWorkbookInit	50000	2,323.5 ms	236.041 ms	61.2990 ms	2,286.0 ms	2,431.9 ms	2,294.2 ms	1.00	0.00	47000.0000	18000.0000	4000.0000	417.1 MB
NpoiXlsxWorkbookInit	50000	7,055.2 ms	279.256 ms	72.5218 ms	6,982.8 ms	7,150.2 ms	7,027.2 ms	3.04	0.10	288000.0000	51000.0000	6000.0000	1545.32 MB
EpplusWorkbookInit	50000	2,806.9 ms	56.266 ms	14.6121 ms	2,792.9 ms	2,829.1 ms	2,804.6 ms	1.21	0.03	79000.0000	27000.0000	7000.0000	578.46 MB

NpoiXlsWorkbookInit	65535	3,646.8 ms	131.129 ms	34.0537 ms	3,603.0 ms	3,696.3 ms	3,642.5 ms	1.00	0.00	61000.0000	21000.0000	4000.0000	504.46 MB
NpoiXlsxWorkbookInit	65535	9,295.6 ms	486.761 ms	126.4104 ms	9,163.3 ms	9,468.6 ms	9,330.5 ms	2.55	0.04	390000.0000	67000.0000	8000.0000	2048.14 MB
EpplusWorkbookInit	65535	3,721.6 ms	124.945 ms	32.4478 ms	3,680.7 ms	3,766.8 ms	3,714.1 ms	1.02	0.01	102000.0000	35000.0000	8000.0000	747.85 MB

From the above test results, npoi xls export performance is still quite good, no matter the time or the memory is dominant, xls just a sheet up to 65,535 rows of data, so the test data only up to 65535, followed by epplus export xlsx, most of the time was npoi export xlsx.

Test results

If you are using NPOI exporting recommended to export xls, if you want to export more data can be exported csv, if looked at in addition to export a csv test, excel csv export performance much better than if it is to excel export, import xls, then on in several sheet processing, if we want to export xlsxformat excel, recommended to deal with epplus, npoi exported compared to the xlsxbetter performance, smaller memory footprint