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const std = @import("std");
const root = @import("../main.zig");
const BenchmarkArgs = root.argument.BenchmarkArgs;
const recognizer = root.recognizer;
fn write_result(
writer: anytype,
is_tty: bool,
name: []const u8,
index: usize,
accepted: bool,
elapsed: u64,
throughput: f64,
) !void {
if (is_tty) {
try writer.print("{s}[{}] {s}\x1b[0m ({}, {d:.2} tps)\n", .{
name,
index,
if (accepted) "\x1b[32maccept"
else "\x1b[31mreject",
std.fmt.fmtDuration(elapsed),
throughput,
});
} else {
try writer.print("{s}[{}] {s} ({}, {d:.2} tps)\n", .{
name,
index,
if (accepted) "accept"
else "reject",
std.fmt.fmtDuration(elapsed),
throughput,
});
}
}
fn write_summary(
writer: anytype,
is_tty: bool,
total: usize,
accepted: usize,
total_time: u64,
throughput: struct { f64, f64, f64 },
) !void {
const min, const max, const avg = throughput;
if (is_tty) {
try writer.print("finished {} ({} \x1b[32maccepted\x1b[0m {d:.2} \x1b[31mrejected\x1b[0m)", .{
total,
accepted,
total - accepted,
});
} else {
try writer.print("finished {} ({} accepted {} rejected)", .{
total,
accepted,
total - accepted,
});
}
try writer.print(" in {} (min: {d:.5} tps, max: {d:.2} tps, average: {d:.2} tps)\n", .{
std.fmt.fmtDuration(total_time),
min,
max,
avg,
});
}
fn min_max_avg(values: []f64) struct { f64, f64, f64 } {
var min: f64 = -1;
var max: f64 = 0;
var sum: f64 = 0;
for (values) |value| {
min = if (min < 0) value else @min(min, value);
max = @max(max, value);
sum += value;
}
return .{ min, max, sum / @as(f64, @floatFromInt(values.len)) };
}
pub fn benchmark(args: *BenchmarkArgs, allocator: std.mem.Allocator) !void {
const stdout = std.io.getStdOut();
const writer = stdout.writer();
var bufreader = std.io.bufferedReader(args.input.file.reader());
var reader = bufreader.reader();
var index: usize = 0;
const stderr = std.io.getStdErr();
var throughputs = std.ArrayList(f64).init(allocator);
defer throughputs.deinit();
if (args.input.file.isTty()) {
try stderr.writeAll("> ");
}
var read_arena = std.heap.ArenaAllocator.init(allocator);
defer read_arena.deinit();
var number_of_accepted: usize = 0;
var total_time: u64 = 0;
var timer = try std.time.Timer.start();
while (try reader.readUntilDelimiterOrEofAlloc(
read_arena.allocator(),
'\n',
std.math.maxInt(usize)
)) |buffer| {
const trimmed = std.mem.trim(u8, buffer, &std.ascii.whitespace);
timer.reset();
const accepted = try recognizer.check(
&args.grammar,
trimmed,
allocator
);
const elapsed = timer.read();
const throughput = @as(f64, @floatFromInt(trimmed.len)) / (@as(f64, @floatFromInt(elapsed)) / std.time.ns_per_s);
try throughputs.append(throughput);
try write_result(
writer,
stdout.isTty(),
args.input.name,
index,
accepted,
elapsed,
throughput,
);
index += 1;
number_of_accepted += @intFromBool(accepted);
total_time += elapsed;
if (args.input.file.isTty()) {
try stderr.writeAll("> ");
}
}
try write_summary(
writer,
stdout.isTty(),
index,
number_of_accepted,
total_time,
min_max_avg(throughputs.items)
);
}
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