poly1305/x25519 benchmark scripts

throughput_poly1305.zig

const std = @import("std");
const time = std.os.time;
const Timer = time.Timer;

const poly1305 = @import("poly1305.zig");

const MiB = 1024 * 1024;
const BytesToHash = 128 * MiB;

pub fn main() !void {
    var stdout_file = try std.io.getStdOut();
    var stdout_out_stream = std.io.FileOutStream.init(&stdout_file);
    const stdout = &stdout_out_stream.stream;

    var out: [16]u8 = undefined;
    var prng = std.rand.DefaultPrng.init(0);

    var in = try std.heap.c_allocator.alloc(u8, BytesToHash);
    prng.random.bytes(in);

    var key: [32]u8 = undefined;
    prng.random.bytes(key[0..]);

    var timer = try Timer.start();
    const start = timer.lap();
    _ = poly1305.crypto_poly1305(out[0..], in, key);
    const end = timer.read();

    const elapsed_s = @intToFloat(f64, end - start) / time.ns_per_s;
    const throughput = @floatToInt(u64, BytesToHash / elapsed_s);

    try stdout.print("{}: {} MiB/s\n", "poly1305", throughput / (1 * MiB));
}

throughput_x25519.zig

const std = @import("std");
const time = std.os.time;
const Timer = time.Timer;

const x25519 = @import("x25519.zig");

const MiB = 1024 * 1024;
const BytesToHash = 128 * MiB;

pub fn main() !void {
    var stdout_file = try std.io.getStdOut();
    var stdout_out_stream = std.io.FileOutStream.init(&stdout_file);
    const stdout = &stdout_out_stream.stream;

    var in = []u8{9} ++ []u8{0} ** 31;
    var out = []u8{9} ++ []u8{0} ** 31;

    var timer = try Timer.start();
    const start = timer.lap();
    var i: usize = 0;
    _ = x25519.crypto_x25519(out[0..], out, in);
    const end = timer.read();

    const elapsed_s = @intToFloat(f64, end - start) / time.ns_per_s;

    try stdout.print("{}: {} exchanges per second\n", "x25519", @floatToInt(usize, 1 / elapsed_s));
}