diff --git a/README.md b/README.md
index 8d59836..91702e3 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ As a comparison, this is the younger sibling of a node variant ( https://github.
 ```
 $ git clone https://github.com/const-void/DOOM-fire-zig/
 $ cd DOOM-fire-zig
-$ zig build run
+$ zig build run -Doptimize=ReleaseFast
 ...
 ```
 Build Requirements:
diff --git a/build.zig b/build.zig
index 34a4771..94c80e4 100644
--- a/build.zig
+++ b/build.zig
@@ -15,12 +15,11 @@ pub fn build(b: *std.Build) void {
     // set a preferred release mode, allowing the user to decide how to optimize.
     const optimize = b.standardOptimizeOption(.{});
 
-    const exe = b.addExecutable(.{
-        .name = "DOOM-fire",
+    const exe = b.addExecutable(.{ .name = "DOOM-fire", .root_module = b.createModule(.{
         .root_source_file = b.path("src/main.zig"),
         .target = target,
         .optimize = optimize,
-    });
+    }) });
 
     //libc linking
     exe.linkLibC();
diff --git a/src/main.zig b/src/main.zig
index cceca94..f172e26 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -8,8 +8,12 @@ const std = @import("std");
 
 const allocator = std.heap.page_allocator;
 
-var stdout: std.fs.File.Writer = undefined;
-var stdin: std.fs.File.Reader = undefined;
+var stdout_buffer: [1024]u8 = undefined;
+var stdout_writer = std.fs.File.stdout().writer(&stdout_buffer);
+const stdout = &stdout_writer.interface;
+var stdin_buffer: [1024]u8 = undefined;
+var stdin_reader = std.fs.File.stdin().reader(&stdin_buffer);
+const stdin = &stdin_reader.interface;
 var g_tty_win: win32.HANDLE = undefined;
 
 ///////////////////////////////////
@@ -121,6 +125,7 @@ pub fn emit(s: []const u8) !void {
         if (sz == 0) {
             return;
         } // cauze I c
+        try stdout.flush();
         return;
     }
 }
@@ -211,11 +216,7 @@ pub fn initColor() !void {
 
 pub fn getTermSzWin() !TermSz {
     //Microsoft Windows Case
-    var info: win32.CONSOLE_SCREEN_BUFFER_INFO = .{ .dwSize = .{ .X = 0, .Y = 0 },
-                                                    .dwCursorPosition = .{.X= 0, .Y= 0},
-                                                    .wAttributes= 0,
-                                                    .srWindow = .{ .Left = 0, .Top = 0, .Right = 0, .Bottom = 0},
-                                                    .dwMaximumWindowSize = .{.X = 0, .Y = 0} };
+    var info: win32.CONSOLE_SCREEN_BUFFER_INFO = .{ .dwSize = .{ .X = 0, .Y = 0 }, .dwCursorPosition = .{ .X = 0, .Y = 0 }, .wAttributes = 0, .srWindow = .{ .Left = 0, .Top = 0, .Right = 0, .Bottom = 0 }, .dwMaximumWindowSize = .{ .X = 0, .Y = 0 } };
 
     if (0 == win32.GetConsoleScreenBufferInfo(g_tty_win, &info)) switch (std.os.windows.kernel32.GetLastError()) {
         else => |e| return std.os.windows.unexpectedError(e),
@@ -231,7 +232,7 @@ pub fn getTermSzLinux() !TermSz {
     //Linux-MacOS Case
 
     //base case - invoked from cmd line
-    const tty_nix = stdout.context.handle;
+    const tty_nix = std.fs.File.stdout().handle;
     var winsz = std.c.winsize{ .col = 0, .row = 0, .xpixel = 0, .ypixel = 0 };
     const rv = std.c.ioctl(tty_nix, TIOCGWINSZ, @intFromPtr(&winsz));
     const err = std.posix.errno(rv);
@@ -339,7 +340,7 @@ pub fn pause() !void {
     try emit(color_reset);
     try emit("Press return to continue...");
     var b: u8 = undefined;
-    b = stdin.readByte() catch undefined;
+    b = try stdin.takeByte();
 
     if (b == 'q') {
         //exit cleanly
@@ -576,11 +577,11 @@ pub fn scrollMarquee() !void {
             try emit(line_clear_to_eol);
             try emit(nl);
 
-            std.time.sleep(10 * std.time.ns_per_ms);
+            std.Thread.sleep(10 * std.time.ns_per_ms);
         }
 
         //let quote chill for a second
-        std.time.sleep(1000 * std.time.ns_per_ms);
+        std.Thread.sleep(1000 * std.time.ns_per_ms);
 
         //fade out
         fade_idx = fade_len - 1;
@@ -598,7 +599,7 @@ pub fn scrollMarquee() !void {
             try emit(txt[txt_idx * 2 + 1]);
             try emit(line_clear_to_eol);
             try emit(nl);
-            std.time.sleep(10 * std.time.ns_per_ms);
+            std.Thread.sleep(10 * std.time.ns_per_ms);
         }
         try emit(nl);
     }
@@ -689,7 +690,7 @@ pub fn paintBuf() !void {
     fps = @as(f64, @floatFromInt(bs_frame_tic)) / t_dur;
 
     try emit(fg[0]);
-    try emitFmt("mem: {s:.2} min / {s:.2} avg / {s:.2} max [ {d:.2} fps ]", .{ std.fmt.fmtIntSizeBin(bs_sz_min), std.fmt.fmtIntSizeBin(bs_sz_avg), std.fmt.fmtIntSizeBin(bs_sz_max), fps });
+    try emitFmt("mem: {Bi:.2} min / {Bi:.2} avg / {Bi:.2} max [ {d:.2} fps ]", .{ bs_sz_min, bs_sz_avg, bs_sz_max, fps });
 }
 
 // initBuf(); defer freeBuf();
@@ -835,9 +836,6 @@ pub fn showDoomFire() !void {
 ///////////////////////////////////
 
 pub fn main() anyerror!void {
-    stdout = std.io.getStdOut().writer();
-    stdin = std.io.getStdIn().reader();
-
     try initTerm();
     defer complete() catch {};