feat: enable simd128

Author: pi0

.oxfmtrc.json

@@ -1,4 +1,6 @@
 {
   "$schema": "./node_modules/oxfmt/configuration_schema.json",
-  "ignorePatterns": []
+  "ignorePatterns": [
+    "lib/_rg.wasm.mjs"
+  ]
 }

README.md

@@ -43,7 +43,7 @@ Absolute filesystem path to a JS shim that runs ripgrep via `ripgrep`. Drop-in r
 
 ## How it works
 
-- ripgrep is cross-compiled to `wasm32-wasip1` via [`cargo zigbuild`](https://github.com/rust-cross/cargo-zigbuild), using Zig as the C compiler/linker.
+- ripgrep is cross-compiled to `wasm32-wasip1` with SIMD (`simd128`) enabled via [`cargo zigbuild`](https://github.com/rust-cross/cargo-zigbuild), using Zig as the C compiler/linker. This unlocks `memchr`'s vectorized search routines for faster byte scanning.
 - The resulting `.wasm` is brotli-compressed and z85-encoded into `lib/_rg.wasm.mjs`, so it ships as a plain ESM module — no `.wasm` asset resolution or postinstall needed.
 - On first use, the z85 blob is decoded and decompressed, then cached to the OS temp directory (`$TMPDIR/ripgrep-wasm-<hash>.wasm`). Subsequent calls (even across processes) skip decoding entirely. The z85 string itself is wrapped in a function so V8 lazy-parses it only when needed.
 - The compiled `WebAssembly.Module` is memoized in-process — repeated `ripgrep()` calls only pay the compilation cost once. Fresh instances are still created per-call since WASI state (memory, file descriptors) is per-instance.

build.zig

@@ -75,6 +75,11 @@ fn addRipgrepBuild(b: *std.Build, rust_triple: []const u8) RipgrepBuild {
     const target_dir = b.pathJoin(&.{ cache_root, "cargo-target", rust_triple });
     cargo.setEnvironmentVariable("CARGO_TARGET_DIR", target_dir);
 
+    // Enable WASM SIMD for wasm targets — unlocks memchr's simd128 vectorized paths.
+    if (std.mem.startsWith(u8, rust_triple, "wasm")) {
+        cargo.setEnvironmentVariable("RUSTFLAGS", "-C target-feature=+simd128");
+    }
+
     const exe_name = b.fmt("rg{s}", .{binExt(rust_triple)});
     const rg_path_str = b.pathJoin(&.{ target_dir, rust_triple, profile, exe_name });
     return .{

build.zig.zon

@@ -1,7 +1,7 @@
 .{
     .name = .ripgrep,
     .version = "0.0.0",
-    .fingerprint = 0x36520762f52ee133,
+    .fingerprint = 0x89b93d7bd4e75448,
     .minimum_zig_version = "0.15.2",
     .paths = .{ "build.zig", "build.zig.zon" },
 }

lib/_rg.mjs

@@ -4,7 +4,7 @@ import { tmpdir } from "node:os";
 import { join } from "node:path";
 
 // Auto generated by build.ts
-const WASM_HASH = "4a7dc2d696452852";
+const WASM_HASH = "226bbe1107b2cfe2";
 
 const cacheFile = join(tmpdir(), `ripgrep-wasm-${WASM_HASH}.wasm`);