add showing time taken for each solution

src/main.zig

@@ -73,6 +73,7 @@ fn run(allocator: Allocator, args: *cli) !u8 {
 
     var input = aoc.Input{ .allocator = allocator, .lines = lines.items };
 
+    var start_time = std.time.microTimestamp();
     var result: aoc.Result = undefined;
     if (args.part == 1) {
         result = try day.part1.?(&input);
@@ -81,6 +82,7 @@ fn run(allocator: Allocator, args: *cli) !u8 {
     } else {
         unreachable;
     }
+    const end_time = std.time.microTimestamp();
 
     switch (result) {
         .uint  => std.debug.print("{}\n", .{result.uint}),
@@ -89,6 +91,9 @@ fn run(allocator: Allocator, args: *cli) !u8 {
         .text  => std.debug.print("{s}\n", .{result.text}),
     }
 
+    const duration = end_time - start_time;
+    std.debug.print("Time taken: {}ms ({}us)\n", .{@divTrunc(duration, std.time.us_per_ms), duration});
+
     return 0;
 }
 
@@ -136,7 +141,7 @@ fn get_input(allocator: Allocator, args: *cli) !u8 {
         return 255;
     }
 
-    const body = try request.reader().readAllAlloc(allocator, kilobytes(8));
+    const body = try request.reader().readAllAlloc(allocator, kilobytes(128));
     defer allocator.free(body);
 
     var file = try std.fs.cwd().createFile(args.input_file, .{ });