Benchmark(s) #2

Smurf-IV · 2025-10-29T14:54:51Z

Smurf-IV
Oct 29, 2025
Maintainer

As of Today (2025-10-29) using the Main branch code and compared with a commercial product (And other Extractors):
Please ignore the XLSb's as they are ridiculously fast (But not multi-sheet-threaded or Range extractors!)

BenchmarkDotNet v0.15.4, Windows 10 (10.0.19045.6456/22H2/2022Update) (VMware)
Intel Xeon CPU E5-2683 v3 2.00GHz, 1 CPU, 24 logical and 24 physical cores
.NET SDK 9.0.306
  [Host]     : .NET 8.0.21 (8.0.21, 8.0.2125.47513), X64 RyuJIT x86-64-v3
  Job-QIVXBG : .NET 9.0.10 (9.0.10, 9.0.1025.47515), X64 RyuJIT x86-64-v3

Platform=X64  Runtime=.NET 9.0  IterationCount=1
WarmupCount=1

| Type              | Method                                 | Mean     | Error | Ratio | Gen0         | Gen1        | Gen2       | Allocated     | Alloc Ratio |
|------------------ |--------------------------------------- |---------:|------:|------:|-------------:|------------:|-----------:|--------------:|------------:|
| ExcelBenchmarks   | LoadXSLXViaExcelDataReaderAsync        | 126.63 s |    NA |  0.95 |  143000.0000 |  28000.0000 | 13000.0000 | 18090972920 B |        0.91 |
| ExcelBenchmarksV7 | LoadXSLXViaEPPlusV7Async               | 133.09 s |    NA |  1.00 |   54000.0000 |  23000.0000 | 10000.0000 | 19861279320 B |        1.00 |
| ExcelBenchmarks   | LoadXSLBViaExcelDataReaderAsync        |  51.79 s |    NA |  0.39 |   74000.0000 |  21000.0000 | 10000.0000 | 12977192576 B |        0.65 |
| ExcelBenchmarksV7 | LoadXSLXSingleViaEPPlusV7Async         | 127.33 s |    NA |  0.96 |   58000.0000 |  23000.0000 | 11000.0000 | 19261330744 B |        0.97 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelDataReaderAsync  | 121.40 s |    NA |  0.91 |  183000.0000 |  26000.0000 | 12000.0000 | 15823913896 B |        0.80 |
| ExcelBenchmarks   | LoadXSLBSingleViaExcelDataReaderAsync  |  50.34 s |    NA |  0.38 |   94000.0000 |  22000.0000 | 10000.0000 | 11903730920 B |        0.60 |
| ExcelBenchmarks   | LoadXSLXViaSylvanDataReaderAsync       |  47.59 s |    NA |  0.36 |  536000.0000 |   5000.0000 |  2000.0000 |  2100604448 B |        0.11 |
| ExcelBenchmarks   | LoadXSLBViaSylvanDataReaderAsync       |  12.97 s |    NA |  0.10 |  173000.0000 |   6000.0000 |  4000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLXSingleViaSylvanDataReaderAsync |  45.10 s |    NA |  0.34 |  548000.0000 |   4000.0000 |  1000.0000 |  2095253632 B |        0.11 |
| ExcelBenchmarks   | LoadXSLBSingleViaSylvanDataReaderAsync |  12.20 s |    NA |  0.09 |   47000.0000 |   5000.0000 |  3000.0000 |   746219480 B |        0.04 |
| ExcelBenchmarks   | LoadXSLXViaXlsxHelperReaderAsync       |  52.26 s |    NA |  0.39 | 1707000.0000 |   2000.0000 |  1000.0000 |  8730251584 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXSingleViaXlsxHelperReaderAsync |  59.25 s |    NA |  0.45 | 1694000.0000 |   3000.0000 |  2000.0000 |  8575323760 B |        0.43 |
| ExcelBenchmarks   | LoadXSLXViaExcelPRIMEReaderAsync       |  86.68 s |    NA |  0.65 |  145000.0000 | 133000.0000 |  7000.0000 | 15415101360 B |        0.78 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelPRIMEReaderAsync |  85.90 s |    NA |  0.65 |  141000.0000 | 129000.0000 |  5000.0000 | 15418463184 B |        0.78 |

Smurf-IV · 2025-11-07T17:20:33Z

Smurf-IV
Nov 7, 2025
Maintainer Author

As of Today 2025-11-07:

| Type              | Method                                 | Mean     | Error | Ratio | Gen0         | Gen1        | Gen2       | Allocated     | Alloc Ratio |
|------------------ |--------------------------------------- |---------:|------:|------:|-------------:|------------:|-----------:|--------------:|------------:|
| ExcelBenchmarks   | LoadXSLXViaExcelDataReaderAsync        | 117.78 s |    NA |  0.95 |  133000.0000 |  27000.0000 | 14000.0000 | 18362081632 B |        0.92 |
| ExcelBenchmarksV7 | LoadXSLXViaEPPlusV7Async               | 124.32 s |    NA |  1.00 |   63000.0000 |  26000.0000 | 12000.0000 | 19861309232 B |        1.00 |
| ExcelBenchmarks   | LoadXSLBViaExcelDataReaderAsync        |  51.77 s |    NA |  0.42 |   75000.0000 |  23000.0000 | 11000.0000 | 12977193904 B |        0.65 |
| ExcelBenchmarksV7 | LoadXSLXSingleViaEPPlusV7Async         | 122.42 s |    NA |  0.98 |   59000.0000 |  24000.0000 | 13000.0000 | 19261307904 B |        0.97 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelDataReaderAsync  | 127.95 s |    NA |  1.03 |  284000.0000 |  34000.0000 | 21000.0000 | 15038243680 B |        0.76 |
| ExcelBenchmarks   | LoadXSLBSingleViaExcelDataReaderAsync  |  49.81 s |    NA |  0.40 |  105000.0000 |  22000.0000 | 11000.0000 | 11903720328 B |        0.60 |
| ExcelBenchmarks   | LoadXSLXViaSylvanDataReaderAsync       |  42.90 s |    NA |  0.35 |  549000.0000 |   4000.0000 |  1000.0000 |  2100726120 B |        0.11 |
| ExcelBenchmarks   | LoadXSLBViaSylvanDataReaderAsync       |  12.38 s |    NA |  0.10 |  316000.0000 |   8000.0000 |  5000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLXSingleViaSylvanDataReaderAsync |  43.77 s |    NA |  0.35 |  396000.0000 |   5000.0000 |  3000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLBSingleViaSylvanDataReaderAsync |  12.33 s |    NA |  0.10 |   26000.0000 |   4000.0000 |  2000.0000 |  1906211960 B |        0.10 |
| ExcelBenchmarks   | LoadXSLXViaXlsxHelperReaderAsync       |  50.80 s |    NA |  0.41 | 1707000.0000 |   2000.0000 |  1000.0000 |  8730251504 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXSingleViaXlsxHelperReaderAsync |  49.97 s |    NA |  0.40 | 2103000.0000 |   2000.0000 |  1000.0000 |  8733495896 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXViaExcelPRIMEReaderAsync       |  58.34 s |    NA |  0.47 |  138000.0000 | 125000.0000 |  6000.0000 | 14623347880 B |        0.74 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelPRIMEReaderAsync |  57.53 s |    NA |  0.46 |  139000.0000 | 126000.0000 |  5000.0000 | 14624067952 B |        0.74 |

0 replies

Smurf-IV · 2025-11-17T16:40:29Z

Smurf-IV
Nov 17, 2025
Maintainer Author

As of Today 2025-11-17 using V2 Beta

BenchmarkDotNet v0.15.4, Windows 10 (10.0.19045.6456/22H2/2022Update) (VMware)
Intel Xeon CPU E5-2683 v3 2.00GHz, 1 CPU, 24 logical and 24 physical cores
.NET SDK 10.0.100
  [Host]     : .NET 8.0.22 (8.0.22, 8.0.2225.52707), X64 RyuJIT x86-64-v3
  Job-QIVXBG : .NET 9.0.11 (9.0.11, 9.0.1125.51716), X64 RyuJIT x86-64-v3
</code></pre><pre style="color: rgb(0, 0, 0); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><code>Platform=X64  Runtime=.NET 9.0  IterationCount=1  
WarmupCount=1

Type	Method	Mean	Error	Ratio	Gen0	Gen1	Gen2	Allocated	Alloc Ratio
ExcelBenchmarks	LoadXSLXViaExcelDataReaderAsync	120.82 s	NA	0.98	136000.0000	29000.0000	13000.0000	18090971032 B	0.91
ExcelBenchmarksV7	LoadXSLXViaEPPlusV7Async	123.65 s	NA	1.00	63000.0000	26000.0000	12000.0000	19861309848 B	1.00
ExcelBenchmarks	LoadXSLBViaExcelDataReaderAsync	52.68 s	NA	0.43	73000.0000	24000.0000	11000.0000	12977200760 B	0.65
ExcelBenchmarksV7	LoadXSLXSingleViaEPPlusV7Async	124.44 s	NA	1.01	64000.0000	26000.0000	14000.0000	19261330512 B	0.97
ExcelBenchmarks	LoadXSLXSingleViaExcelDataReaderAsync	118.80 s	NA	0.96	172000.0000	25000.0000	10000.0000	17898763776 B	0.90
ExcelBenchmarks	LoadXSLBSingleViaExcelDataReaderAsync	47.56 s	NA	0.38	96000.0000	22000.0000	10000.0000	11903723648 B	0.60
ExcelBenchmarks	LoadXSLXViaSylvanDataReaderAsync	44.12 s	NA	0.36	549000.0000	2000.0000	1000.0000	2100727248 B	0.11
ExcelBenchmarks	LoadXSLBViaSylvanDataReaderAsync	12.46 s	NA	0.10	93000.0000	5000.0000	4000.0000	-	0.00
ExcelBenchmarks	LoadXSLXSingleViaSylvanDataReaderAsync	45.93 s	NA	0.37	396000.0000	5000.0000	2000.0000	-	0.00
ExcelBenchmarks	LoadXSLBSingleViaSylvanDataReaderAsync	12.20 s	NA	0.10	28000.0000	4000.0000	2000.0000	1906351384 B	0.10
ExcelBenchmarks	LoadXSLXViaXlsxHelperReaderAsync	52.46 s	NA	0.42	1707000.0000	2000.0000	1000.0000	8730251584 B	0.44
ExcelBenchmarks	LoadXSLXSingleViaXlsxHelperReaderAsync	50.80 s	NA	0.41	1705000.0000	2000.0000	1000.0000	8733409928 B	0.44
ExcelBenchmarks	LoadXSLXViaExcelPRIMEReaderAsync	56.92 s	NA	0.46	137000.0000	125000.0000	6000.0000	14766810192 B	0.74
ExcelBenchmarks	LoadXSLXSingleViaExcelPRIMEReaderAsync	58.92 s	NA	0.48	155000.0000	142000.0000	5000.0000	14767537408 B	0.74

0 replies

Smurf-IV · 2025-11-19T13:05:12Z

Smurf-IV
Nov 19, 2025
Maintainer Author

As of 2025-11-19 (V2 Beta2)
Moving to non Async:

| Type              | Method                                 | Mean     | Error | Ratio | Gen0         | Gen1        | Gen2       | Allocated   | Alloc Ratio |
|------------------ |--------------------------------------- |---------:|------:|------:|-------------:|------------:|-----------:|------------:|------------:|
| ExcelBenchmarks   | LoadXSLXViaExcelDataReaderAsync        | 147.22 s |    NA |  1.18 |  136000.0000 |  33000.0000 | 17000.0000 | 17252.92 MB |        0.91 |
| ExcelBenchmarksV7 | LoadXSLXViaEPPlusV7Async               | 124.90 s |    NA |  1.00 |   60000.0000 |  26000.0000 | 13000.0000 | 18941.21 MB |        1.00 |
| ExcelBenchmarks   | LoadXSLBViaExcelDataReaderAsync        |  67.69 s |    NA |  0.54 |   80000.0000 |  23000.0000 | 12000.0000 | 12376.02 MB |        0.65 |
| ExcelBenchmarksV7 | LoadXSLXSingleViaEPPlusV7Async         | 125.01 s |    NA |  1.00 |   70000.0000 |  27000.0000 | 14000.0000 | 18369.04 MB |        0.97 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelDataReaderAsync  | 119.82 s |    NA |  0.96 |  234000.0000 |  31000.0000 | 17000.0000 | 14028.58 MB |        0.74 |
| ExcelBenchmarks   | LoadXSLBSingleViaExcelDataReaderAsync  |  48.51 s |    NA |  0.39 |  107000.0000 |  19000.0000 |  9000.0000 | 11352.27 MB |        0.60 |
| ExcelBenchmarks   | LoadXSLXViaSylvanDataReaderAsync       |  44.42 s |    NA |  0.36 |  549000.0000 |   2000.0000 |  1000.0000 |  2003.41 MB |        0.11 |
| ExcelBenchmarks   | LoadXSLBViaSylvanDataReaderAsync       |  11.97 s |    NA |  0.10 |   33000.0000 |   5000.0000 |  3000.0000 |   352.35 MB |        0.02 |
| ExcelBenchmarks   | LoadXSLXSingleViaSylvanDataReaderAsync |  44.62 s |    NA |  0.36 |  548000.0000 |   4000.0000 |  1000.0000 |  1998.19 MB |        0.11 |
| ExcelBenchmarks   | LoadXSLBSingleViaSylvanDataReaderAsync |  11.83 s |    NA |  0.09 |   17000.0000 |   3000.0000 |  2000.0000 |   1817.9 MB |        0.10 |
| ExcelBenchmarks   | LoadXSLXViaXlsxHelperReaderAsync       |  53.22 s |    NA |  0.43 | 1707000.0000 |   2000.0000 |  1000.0000 |  8325.82 MB |        0.44 |
| ExcelBenchmarks   | LoadXSLXSingleViaXlsxHelperReaderAsync |  50.77 s |    NA |  0.41 | 1708000.0000 |   2000.0000 |  1000.0000 |  8328.83 MB |        0.44 |
| ExcelBenchmarks   | LoadXSLXViaExcelPRIMEReader            |  42.54 s |    NA |  0.34 |  144000.0000 | 133000.0000 |  6000.0000 | 10452.35 MB |        0.55 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelPRIMEReader      |  44.20 s |    NA |  0.35 |  146000.0000 | 134000.0000 |  6000.0000 | 10453.12 MB |        0.55 |

1 reply

Smurf-IV Nov 19, 2025
Maintainer Author

Now the fastest XSLX reader in real world usage :-)

Smurf-IV · 2025-12-02T08:58:09Z

Smurf-IV
Dec 2, 2025
Maintainer Author

As of 2025-12-01 (V2 Beta)

Now even faster
Memory has reduced

| Type              | Method                                 | Mean     | Error | Ratio | Gen0         | Gen1       | Gen2       | Allocated     | Alloc Ratio |
|------------------ |--------------------------------------- |---------:|------:|------:|-------------:|-----------:|-----------:|--------------:|------------:|
| ExcelBenchmarks   | LoadXSLXViaExcelDataReaderAsync        | 118.88 s |    NA |  0.92 |  129000.0000 | 30000.0000 | 15000.0000 | 21336755280 B |        1.07 |
| ExcelBenchmarksV7 | LoadXSLXViaEPPlusV7Async               | 129.35 s |    NA |  1.00 |   62000.0000 | 27000.0000 | 13000.0000 | 19861316432 B |        1.00 |
| ExcelBenchmarks   | LoadXSLBViaExcelDataReaderAsync        |  52.59 s |    NA |  0.41 |   72000.0000 | 26000.0000 | 12000.0000 | 12977207176 B |        0.65 |
| ExcelBenchmarksV7 | LoadXSLXSingleViaEPPlusV7Async         | 123.76 s |    NA |  0.96 |   59000.0000 | 24000.0000 | 12000.0000 | 19261335424 B |        0.97 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelDataReaderAsync  | 122.92 s |    NA |  0.95 |  215000.0000 | 30000.0000 | 17000.0000 | 16818039512 B |        0.85 |
| ExcelBenchmarks   | LoadXSLBSingleViaExcelDataReaderAsync  |  49.69 s |    NA |  0.38 |  112000.0000 | 26000.0000 | 15000.0000 | 11903730960 B |        0.60 |
| ExcelBenchmarks   | LoadXSLXViaSylvanDataReaderAsync       |  47.38 s |    NA |  0.37 |  379000.0000 |  5000.0000 |  2000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLBViaSylvanDataReaderAsync       |  12.38 s |    NA |  0.10 |   65000.0000 |  5000.0000 |  3000.0000 |  1507586104 B |        0.08 |
| ExcelBenchmarks   | LoadXSLXSingleViaSylvanDataReaderAsync |  44.96 s |    NA |  0.35 |   84000.0000 |  7000.0000 |  4000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLBSingleViaSylvanDataReaderAsync |  13.81 s |    NA |  0.11 |   17000.0000 |  3000.0000 |  2000.0000 |  2504223512 B |        0.13 |
| ExcelBenchmarks   | LoadXSLXViaXlsxHelperReaderAsync       |  52.21 s |    NA |  0.40 | 1705000.0000 |  2000.0000 |  1000.0000 |  8730251152 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXSingleViaXlsxHelperReaderAsync |  55.78 s |    NA |  0.43 | 1705000.0000 |  2000.0000 |  1000.0000 |  8733409928 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXViaExcelPRIMEReader            |  41.66 s |    NA |  0.32 |   97000.0000 | 86000.0000 |  6000.0000 |  7492569392 B |        0.38 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelPRIMEReader      |  41.42 s |    NA |  0.32 |   98000.0000 | 85000.0000 |  8000.0000 |  7493388416 B |        0.38 |

0 replies

kmc-simon-coghlan · 2025-12-10T12:30:17Z

kmc-simon-coghlan
Dec 10, 2025

As of today 2025-12-10 with V2.
Even Faster, And
Less Memory ;-)

| Type              | Method                                 | Mean     | Error | Ratio | Gen0         | Gen1       | Gen2       | Allocated     | Alloc Ratio |
|------------------ |--------------------------------------- |---------:|------:|------:|-------------:|-----------:|-----------:|--------------:|------------:|
| ExcelBenchmarks   | LoadXSLXViaExcelDataReaderAsync        | 123.93 s |    NA |  0.92 |  143000.0000 | 33000.0000 | 17000.0000 | 25922729744 B |        1.31 |
| ExcelBenchmarksV7 | LoadXSLXViaEPPlusV7Async               | 134.87 s |    NA |  1.00 |   65000.0000 | 26000.0000 | 13000.0000 | 19861308536 B |        1.00 |
| ExcelBenchmarks   | LoadXSLBViaExcelDataReaderAsync        |  52.73 s |    NA |  0.39 |   71000.0000 | 22000.0000 | 10000.0000 | 12977196136 B |        0.65 |
| ExcelBenchmarksV7 | LoadXSLXSingleViaEPPlusV7Async         | 125.49 s |    NA |  0.93 |   60000.0000 | 25000.0000 | 12000.0000 | 19261324816 B |        0.97 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelDataReaderAsync  | 124.68 s |    NA |  0.92 |  205000.0000 | 30000.0000 | 16000.0000 | 17542305280 B |        0.88 |
| ExcelBenchmarks   | LoadXSLBSingleViaExcelDataReaderAsync  |  48.20 s |    NA |  0.36 |  101000.0000 | 21000.0000 | 10000.0000 | 11903718336 B |        0.60 |
| ExcelBenchmarks   | LoadXSLXViaSylvanDataReaderAsync       |  47.90 s |    NA |  0.36 |  398000.0000 |  5000.0000 |  2000.0000 |             - |        0.00 |
| ExcelBenchmarks   | LoadXSLBViaSylvanDataReaderAsync       |  13.14 s |    NA |  0.10 |   15000.0000 |  4000.0000 |  2000.0000 |  1910475416 B |        0.10 |
| ExcelBenchmarks   | LoadXSLXSingleViaSylvanDataReaderAsync |  49.40 s |    NA |  0.37 |   18000.0000 |  4000.0000 |  2000.0000 |  2095259736 B |        0.11 |
| ExcelBenchmarks   | LoadXSLBSingleViaSylvanDataReaderAsync |  14.06 s |    NA |  0.10 |   27000.0000 |  4000.0000 |  2000.0000 |  1906214536 B |        0.10 |
| ExcelBenchmarks   | LoadXSLXViaXlsxHelperReaderAsync       |  56.71 s |    NA |  0.42 | 1707000.0000 |  2000.0000 |  1000.0000 |  8730251504 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXSingleViaXlsxHelperReaderAsync |  53.39 s |    NA |  0.40 | 1708000.0000 |  2000.0000 |  1000.0000 |  8733410576 B |        0.44 |
| ExcelBenchmarks   | LoadXSLXViaExcelPRIMEReader            |  37.38 s |    NA |  0.28 | 1040000.0000 | 28000.0000 |  8000.0000 |  5438480984 B |        0.27 |
| ExcelBenchmarks   | LoadXSLXSingleViaExcelPRIMEReader      |  36.06 s |    NA |  0.27 | 1038000.0000 | 11000.0000 |  8000.0000 |  5424084136 B |        0.27 |

0 replies

kmc-simon-coghlan · 2026-01-05T12:42:48Z

kmc-simon-coghlan
Jan 5, 2026

Using V3 RC1 (As of today 2026-01-05)

Still the fastest for XLSX (Yellow)
And on par fastest for XLSB (Green)

0 replies

kmc-simon-coghlan · 2026-01-21T12:28:50Z

kmc-simon-coghlan
Jan 21, 2026

Using V4 Alpha (With the Aged Fix)
Note: Its a new computer, so all the timings are reduced, but its the ratio that's still important and still reflects above.