Żmij 🐉

Zig implementation of a fast floating point to string conversion algorithm

Inspirations:

1. Victor Zverovich's C/C++ implementation - Reference Implementation
2. David Tolnay's Rust implementation

Example

const zmij = @import("zmij.zig");
const expectEqualStrings = @import("std").testing.expectEqualStrings;

pub fn main() !void {
    var buf = zmij.Buffer{};
    const printed = buf.format(1.234);
    try expectEqualStrings("1.234e+00", printed);
}

Benchmark

The code has been benchmarked against std.fmt and the results are as follows:

Value(std.fmt)	Avg. Time (ns)	Value(zmij)	Avg. Time (ns)
1.23456e2	221.653	1.23456e+02	84.108542
3.141592653589793e0	196.794667	3.141592653589793e+00	101.46225
1e-20	238.503166	1.e-20	83.8725
1.2345678901234567e300	199.355334	1.2345678901234567e+300	98.94025
0e0	88.918	0	5.84175