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add benchmark for measuring parser performance
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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; | ||
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const source = @embedFile("../os/index.zig"); | ||
var fixed_buffer_mem: [10 * 1024 * 1024]u8 = undefined; | ||
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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); | ||
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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); | ||
} | ||
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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; | ||
} |