Żmij :dragon:

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	46.477042	1.23456e2	15.358958
3.141592653589793e0	23.618917	3.141592653589793e0	18.435417
1e-20	53.539584	1e-20	14.902084
1.2345678901234567e300	24.850875	1.2345678901234567e300	18.55775
0e0	14.432	0e0	0.910042

To run it on your own machine, use:

zig build bench -Doptimize=ReleaseFast