bench: refresh fidelity + perf results with 15 adapters

Full benchmark run with phase breakdown across all 15 available adapters
(19 features). WolfXL scores 102/108 fidelity (94% of openpyxl) at 4-9x
faster throughput. Includes updated heatmap, scatter plots, and HTML dashboard.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: wolfiesch

results/DASHBOARD.md

@@ -1,6 +1,6 @@
 # ExcelBench Dashboard
 
-*Profile: xlsx | Generated: 2026-02-14T15:25:20.758972+00:00*
+*Profile: xlsx | Generated: 2026-02-16T02:40:41.595881+00:00*
 
 > Combined fidelity and performance view. Fidelity shows correctness;
 > throughput shows speed. Use this to find the right library for your needs.
@@ -10,17 +10,18 @@
 | Library | Caps | Green Features | Pass Rate | Best For |
 |---------|:----:|:--------------:|:---------:|----------|
 | openpyxl | R+W | 18/18 | 100% | Full-fidelity read + write |
+| calamine-styled | R | 17/18 | 98% | General use |
+| rust_xlsxwriter | W | 17/18 | 98% | General use |
+| wolfxl | R+W | 17/18 | 98% | General use |
 | xlsxwriter | W | 16/18 | 90% | High-fidelity write-only workflows |
-| umya-spreadsheet | R+W | 15/18 | 92% | General use |
 | xlsxwriter-constmem | W | 13/18 | 85% | Large file writes with memory limits |
-| rust_xlsxwriter | W | 8/18 | 68% | General use |
 | xlwt | W | 4/18 | 58% | Legacy .xls file writes |
 | openpyxl-readonly | R | 3/18 | 22% | Streaming reads when formatting isn't needed |
 | pandas | R+W | 3/18 | 19% | Data analysis pipelines (accept NaN coercion) |
 | pyexcel | R+W | 3/18 | 20% | Multi-format compatibility layer |
 | tablib | R+W | 3/18 | 20% | Dataset export/import workflows |
+| calamine | R | 2/18 | 18% | General use |
 | pylightxl | R+W | 2/18 | 18% | Lightweight value extraction |
-| calamine | R | 1/18 | 18% | General use |
 | python-calamine | R | 1/18 | 16% | Fast bulk value reads |
 | polars | R | 0/18 | 14% | High-performance DataFrames (values only) |
 

results/README.md

@@ -2,10 +2,9 @@ library,feature,read_score,write_score
 openpyxl,cell_values,3,3
 xlsxwriter,cell_values,,3
 python-calamine,cell_values,1,
-calamine,cell_values,1,
-rust_xlsxwriter,cell_values,,1
-umya-spreadsheet,cell_values,3,3
-pyumya,cell_values,3,3
+calamine-styled,cell_values,3,
+rust_xlsxwriter,cell_values,,3
+wolfxl,cell_values,3,3
 pylightxl,cell_values,3,1
 xlrd,cell_values,,
 pyexcel,cell_values,3,3
@@ -18,10 +17,9 @@ tablib,cell_values,3,3
 openpyxl,formulas,3,3
 xlsxwriter,formulas,,3
 python-calamine,formulas,0,
-calamine,formulas,0,
+calamine-styled,formulas,3,
 rust_xlsxwriter,formulas,,3
-umya-spreadsheet,formulas,3,3
-pyumya,formulas,3,3
+wolfxl,formulas,3,3
 pylightxl,formulas,0,3
 xlrd,formulas,,
 pyexcel,formulas,0,3
@@ -34,10 +32,9 @@ tablib,formulas,0,3
 openpyxl,text_formatting,3,3
 xlsxwriter,text_formatting,,3
 python-calamine,text_formatting,0,
-calamine,text_formatting,0,
+calamine-styled,text_formatting,3,
 rust_xlsxwriter,text_formatting,,3
-umya-spreadsheet,text_formatting,3,3
-pyumya,text_formatting,3,3
+wolfxl,text_formatting,3,3
 pylightxl,text_formatting,0,0
 xlrd,text_formatting,,
 pyexcel,text_formatting,0,0
@@ -50,10 +47,9 @@ tablib,text_formatting,0,0
 openpyxl,background_colors,3,3
 xlsxwriter,background_colors,,3
 python-calamine,background_colors,0,
-calamine,background_colors,0,
+calamine-styled,background_colors,3,
 rust_xlsxwriter,background_colors,,3
-umya-spreadsheet,background_colors,3,3
-pyumya,background_colors,3,3
+wolfxl,background_colors,3,3
 pylightxl,background_colors,0,0
 xlrd,background_colors,,
 pyexcel,background_colors,0,0
@@ -66,10 +62,9 @@ tablib,background_colors,0,0
 openpyxl,number_formats,3,3
 xlsxwriter,number_formats,,3
 python-calamine,number_formats,0,
-calamine,number_formats,0,
+calamine-styled,number_formats,3,
 rust_xlsxwriter,number_formats,,3
-umya-spreadsheet,number_formats,3,3
-pyumya,number_formats,3,3
+wolfxl,number_formats,3,3
 pylightxl,number_formats,0,0
 xlrd,number_formats,,
 pyexcel,number_formats,0,1
@@ -82,10 +77,9 @@ tablib,number_formats,0,1
 openpyxl,alignment,3,3
 xlsxwriter,alignment,,3
 python-calamine,alignment,1,
-calamine,alignment,1,
+calamine-styled,alignment,3,
 rust_xlsxwriter,alignment,,3
-umya-spreadsheet,alignment,1,1
-pyumya,alignment,1,0
+wolfxl,alignment,3,3
 pylightxl,alignment,0,1
 xlrd,alignment,,
 pyexcel,alignment,1,1
@@ -98,10 +92,9 @@ tablib,alignment,1,1
 openpyxl,borders,3,3
 xlsxwriter,borders,,3
 python-calamine,borders,0,
-calamine,borders,0,
+calamine-styled,borders,3,
 rust_xlsxwriter,borders,,3
-umya-spreadsheet,borders,1,1
-pyumya,borders,1,0
+wolfxl,borders,3,3
 pylightxl,borders,0,0
 xlrd,borders,,
 pyexcel,borders,0,0
@@ -114,10 +107,9 @@ tablib,borders,0,0
 openpyxl,dimensions,3,3
 xlsxwriter,dimensions,,3
 python-calamine,dimensions,0,
-calamine,dimensions,0,
+calamine-styled,dimensions,3,
 rust_xlsxwriter,dimensions,,3
-umya-spreadsheet,dimensions,1,3
-pyumya,dimensions,3,3
+wolfxl,dimensions,3,3
 pylightxl,dimensions,0,0
 xlrd,dimensions,,
 pyexcel,dimensions,0,0
@@ -130,10 +122,9 @@ tablib,dimensions,0,0
 openpyxl,multiple_sheets,3,3
 xlsxwriter,multiple_sheets,,3
 python-calamine,multiple_sheets,3,
-calamine,multiple_sheets,3,
+calamine-styled,multiple_sheets,3,
 rust_xlsxwriter,multiple_sheets,,3
-umya-spreadsheet,multiple_sheets,3,3
-pyumya,multiple_sheets,3,3
+wolfxl,multiple_sheets,3,3
 pylightxl,multiple_sheets,3,3
 xlrd,multiple_sheets,,
 pyexcel,multiple_sheets,3,3
@@ -146,10 +137,9 @@ tablib,multiple_sheets,3,3
 openpyxl,merged_cells,3,3
 xlsxwriter,merged_cells,,3
 python-calamine,merged_cells,0,
-calamine,merged_cells,0,
-rust_xlsxwriter,merged_cells,,0
-umya-spreadsheet,merged_cells,3,3
-pyumya,merged_cells,3,3
+calamine-styled,merged_cells,3,
+rust_xlsxwriter,merged_cells,,3
+wolfxl,merged_cells,3,3
 pylightxl,merged_cells,0,0
 xlrd,merged_cells,,
 pyexcel,merged_cells,0,0
@@ -162,10 +152,9 @@ tablib,merged_cells,0,0
 openpyxl,conditional_formatting,3,3
 xlsxwriter,conditional_formatting,,3
 python-calamine,conditional_formatting,0,
-calamine,conditional_formatting,0,
-rust_xlsxwriter,conditional_formatting,,0
-umya-spreadsheet,conditional_formatting,3,0
-pyumya,conditional_formatting,3,3
+calamine-styled,conditional_formatting,3,
+rust_xlsxwriter,conditional_formatting,,3
+wolfxl,conditional_formatting,3,3
 pylightxl,conditional_formatting,0,0
 xlrd,conditional_formatting,,
 pyexcel,conditional_formatting,0,0
@@ -178,10 +167,9 @@ tablib,conditional_formatting,0,0
 openpyxl,data_validation,3,3
 xlsxwriter,data_validation,,3
 python-calamine,data_validation,0,
-calamine,data_validation,0,
-rust_xlsxwriter,data_validation,,0
-umya-spreadsheet,data_validation,3,3
-pyumya,data_validation,3,3
+calamine-styled,data_validation,3,
+rust_xlsxwriter,data_validation,,3
+wolfxl,data_validation,3,3
 pylightxl,data_validation,0,0
 xlrd,data_validation,,
 pyexcel,data_validation,0,0
@@ -194,10 +182,9 @@ tablib,data_validation,0,0
 openpyxl,hyperlinks,3,3
 xlsxwriter,hyperlinks,,3
 python-calamine,hyperlinks,0,
-calamine,hyperlinks,0,
-rust_xlsxwriter,hyperlinks,,0
-umya-spreadsheet,hyperlinks,0,0
-pyumya,hyperlinks,3,3
+calamine-styled,hyperlinks,3,
+rust_xlsxwriter,hyperlinks,,3
+wolfxl,hyperlinks,3,3
 pylightxl,hyperlinks,0,0
 xlrd,hyperlinks,,
 pyexcel,hyperlinks,0,0
@@ -210,10 +197,9 @@ tablib,hyperlinks,0,0
 openpyxl,images,3,3
 xlsxwriter,images,,3
 python-calamine,images,0,
-calamine,images,0,
+calamine-styled,images,0,
 rust_xlsxwriter,images,,0
-umya-spreadsheet,images,0,3
-pyumya,images,3,3
+wolfxl,images,0,0
 pylightxl,images,0,0
 xlrd,images,,
 pyexcel,images,0,0
@@ -226,10 +212,9 @@ tablib,images,0,0
 openpyxl,pivot_tables,,
 xlsxwriter,pivot_tables,,
 python-calamine,pivot_tables,,
-calamine,pivot_tables,,
+calamine-styled,pivot_tables,,
 rust_xlsxwriter,pivot_tables,,
-umya-spreadsheet,pivot_tables,,
-pyumya,pivot_tables,,
+wolfxl,pivot_tables,,
 pylightxl,pivot_tables,,
 xlrd,pivot_tables,,
 pyexcel,pivot_tables,,
@@ -242,10 +227,9 @@ tablib,pivot_tables,,
 openpyxl,comments,3,3
 xlsxwriter,comments,,3
 python-calamine,comments,0,
-calamine,comments,0,
-rust_xlsxwriter,comments,,0
-umya-spreadsheet,comments,3,3
-pyumya,comments,3,3
+calamine-styled,comments,3,
+rust_xlsxwriter,comments,,3
+wolfxl,comments,3,3
 pylightxl,comments,0,0
 xlrd,comments,,
 pyexcel,comments,0,0
@@ -258,10 +242,9 @@ tablib,comments,0,0
 openpyxl,freeze_panes,3,3
 xlsxwriter,freeze_panes,,3
 python-calamine,freeze_panes,0,
-calamine,freeze_panes,0,
-rust_xlsxwriter,freeze_panes,,0
-umya-spreadsheet,freeze_panes,3,3
-pyumya,freeze_panes,3,3
+calamine-styled,freeze_panes,3,
+rust_xlsxwriter,freeze_panes,,3
+wolfxl,freeze_panes,3,3
 pylightxl,freeze_panes,0,0
 xlrd,freeze_panes,,
 pyexcel,freeze_panes,0,0
@@ -274,10 +257,9 @@ tablib,freeze_panes,0,0
 openpyxl,named_ranges,3,3
 xlsxwriter,named_ranges,,0
 python-calamine,named_ranges,0,
-calamine,named_ranges,0,
-rust_xlsxwriter,named_ranges,,0
-umya-spreadsheet,named_ranges,3,3
-pyumya,named_ranges,0,0
+calamine-styled,named_ranges,3,
+rust_xlsxwriter,named_ranges,,3
+wolfxl,named_ranges,3,3
 pylightxl,named_ranges,0,0
 xlrd,named_ranges,,
 pyexcel,named_ranges,0,0
@@ -290,10 +272,9 @@ tablib,named_ranges,0,0
 openpyxl,tables,3,3
 xlsxwriter,tables,,0
 python-calamine,tables,0,
-calamine,tables,0,
-rust_xlsxwriter,tables,,0
-umya-spreadsheet,tables,2,3
-pyumya,tables,0,0
+calamine-styled,tables,3,
+rust_xlsxwriter,tables,,3
+wolfxl,tables,3,3
 pylightxl,tables,0,0
 xlrd,tables,,
 pyexcel,tables,0,0