From a43dc216f03c0bfed51ca539d027a90adc689ac8 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Mon, 6 Jul 2026 13:50:54 -0300 Subject: tty: coalesce queued input events into one frame; tracy zones behind -Dtracy The tty shell rendered (core.render + full vaxis repaint + tree-sitter re-highlight of the visible window) after EVERY event, so a wheel flick over a highlighted file was 150 re-parses and 150 terminal repaints; the gui shell drains the SDL queue before drawing and never had the issue. Now the tty loop applies every queued input event, then renders once (batch cap 64; pty output keeps a frame per chunk so progress paints and transient-state waits behave exactly as before). Measured with tracy on a 2400-line .zig scroll script: 150 highlightFileRange calls at 1.85ms mean -> 4; render pipeline total 730ms -> 64ms; 364 frames -> 39. Snap suite 18/18. Tracy: -Dtracy= compiles TracyClient.cpp into the binary and turns src/tracy.zig zones live (default off, all no-ops). Sampling, callstacks, system tracing and the crash handler are disabled: tracy's symbol worker SIGSEGVs on this binary's debug info and its crash handler then parks every thread before the first frame. Capture: tracy-capture -o t.tracy; export: tracy-csvexport t.tracy. --- build.zig | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'build.zig') diff --git a/build.zig b/build.zig index 22dd7158..41f4c0ec 100644 --- a/build.zig +++ b/build.zig @@ -16,6 +16,7 @@ pub fn build(b: *std.Build) void { const optimize = if (is_emscripten) .ReleaseSmall else requested_optimize; const default_grammars: TreeSitterGrammars = if (is_emscripten) .minimal else .full; const tree_sitter_grammars = b.option(TreeSitterGrammars, "tree-sitter", "tree-sitter grammar set: disabled, minimal, full") orelse default_grammars; + const tracy = b.option([]const u8, "tracy", "enable Tracy profiling; supply the path to a Tracy source checkout"); // the browser shell: zig object + emcc link + html, installed to zig-out/web const web_step = b.step("web", "build the browser shell into zig-out/web (-Dplatform=web -Dtarget=wasm32-emscripten -Ddump=)"); @@ -64,8 +65,32 @@ pub fn build(b: *std.Build) void { opts.addOption(bool, "syntax_highlighting", tree_sitter_grammars != .disabled); opts.addOption(bool, "syntax_minimal_grammars", tree_sitter_grammars != .disabled); opts.addOption(bool, "syntax_full_grammars", tree_sitter_grammars == .full); + opts.addOption(bool, "enable_tracy", tracy != null); root_mod.addOptions("pardes_config", opts); + // Tracy zones (src/tracy.zig): compile the client into the binary only when + // -Dtracy= names a Tracy checkout; otherwise every zone is a no-op. + // Sampling/callstacks/system tracing stay off: tracy's symbol worker + // SIGSEGVs on this binary's debug info, and its crash handler then parks + // every thread — the app wedges before the first frame. Zones don't need + // any of it. + if (tracy) |tracy_path| { + root_mod.addIncludePath(.{ .cwd_relative = tracy_path }); + root_mod.addCSourceFile(.{ + .file = .{ .cwd_relative = b.pathJoin(&.{ tracy_path, "public", "TracyClient.cpp" }) }, + .flags = &.{ + "-DTRACY_ENABLE=1", + "-DTRACY_NO_SAMPLING", + "-DTRACY_NO_CALLSTACK", + "-DTRACY_NO_SYSTEM_TRACING", + "-DTRACY_NO_CRASH_HANDLER", + "-DTRACY_NO_CODE_TRANSFER", + "-fno-sanitize=undefined", + }, + }); + root_mod.link_libcpp = true; + } + // tree-sitter: the zig bindings + C runtime, one static lib per grammar, // and each grammar's highlights.scm slurped at build time into the // ts_queries options module (codegen consumed by comptime in syntax.zig). -- cgit v1.3