Benchmarks

Two 50,000-row workbooks, compared with SheetJS 0.20.3 using its default options. Lower is better.

Open in Node

126–136 ms

First view in the browser

130–135 ms

Longest page freeze

None over 50 ms

Memory

Open in Node

139–148 ms

First view in the browser

140–154 ms

Longest page freeze

None over 50 ms

Memory

Gzipped

EatSheet recalculates formulas while opening, and SheetJS doesn't, so the second workbook does more work for EatSheet.

SheetJS does far more overall. Use it if you need to write files, or read .xls, .xlsb or .ods.

Medians of 7 benchmark runs on one modern computer. Each Node figure is itself a median of 5 fresh processes. Times vary by machine, so compare the ratios rather than the milliseconds, or try your own file.