diff --git a/std/zig/bench.zig b/std/zig/bench.zig new file mode 100644 index 000000000..c3b6b0d3d --- /dev/null +++ b/std/zig/bench.zig @@ -0,0 +1,38 @@ +const std = @import("std"); +const mem = std.mem; +const warn = std.debug.warn; +const Tokenizer = std.zig.Tokenizer; +const Parser = std.zig.Parser; +const io = std.io; + +const source = @embedFile("../os/index.zig"); +var fixed_buffer_mem: [10 * 1024 * 1024]u8 = undefined; + +pub fn main() !void { + var i: usize = 0; + var timer = try std.os.time.Timer.start(); + const start = timer.lap(); + const iterations = 100; + var memory_used: usize = 0; + while (i < iterations) : (i += 1) { + memory_used += testOnce(); + } + const end = timer.read(); + memory_used /= iterations; + const elapsed_s = f64(end - start) / std.os.time.ns_per_s; + const bytes_per_sec = f64(source.len * iterations) / elapsed_s; + const mb_per_sec = bytes_per_sec / (1024 * 1024); + + var stdout_file = try std.io.getStdOut(); + const stdout = &std.io.FileOutStream.init(&stdout_file).stream; + try stdout.print("{.3} MB/s, {} KB used \n", mb_per_sec, memory_used / 1024); +} + +fn testOnce() usize { + var fixed_buf_alloc = std.heap.FixedBufferAllocator.init(fixed_buffer_mem[0..]); + var allocator = &fixed_buf_alloc.allocator; + var tokenizer = Tokenizer.init(source); + var parser = Parser.init(&tokenizer, allocator, "(memory buffer)"); + _ = parser.parse() catch @panic("parse failure"); + return fixed_buf_alloc.end_index; +}