diff --git a/Cargo.lock b/Cargo.lock
index 1c1607e4c1a..3355e1ddaef 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2598,12 +2598,76 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "num"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35bd024e8b2ff75562e5f34e7f4905839deb4b22955ef5e73d2fea1b9813cb23"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+]
+
+[[package]]
+name = "num-bigint"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
 
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-iter"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1429034a0490724d0075ebb2bc9e875d6503c3cf69e235a8941aa757d83ef5bf"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -5630,6 +5694,17 @@ dependencies = [
  "std",
 ]
 
+[[package]]
+name = "test-float-parse"
+version = "0.1.0"
+dependencies = [
+ "indicatif",
+ "num",
+ "rand",
+ "rand_chacha",
+ "rayon",
+]
+
 [[package]]
 name = "textwrap"
 version = "0.16.1"
diff --git a/Cargo.toml b/Cargo.toml
index ce87a8c20b7..043f339883a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,6 +4,7 @@ members = [
   "compiler/rustc",
   "library/std",
   "library/sysroot",
+  "src/etc/test-float-parse",
   "src/rustdoc-json-types",
   "src/tools/build_helper",
   "src/tools/cargotest",
@@ -109,6 +110,18 @@ strip = true
 debug = 0
 strip = true
 
+# Bigint libraries are slow without optimization, speed up testing
+[profile.dev.package.test-float-parse]
+opt-level = 3
+
+# Speed up the binary as much as possible
+[profile.release.package.test-float-parse]
+opt-level = 3
+codegen-units = 1
+# FIXME: LTO cannot be enabled for binaries in a workspace
+# <https://github.com/rust-lang/cargo/issues/9330>
+# lto = true
+
 [patch.crates-io]
 # See comments in `library/rustc-std-workspace-core/README.md` for what's going on
 # here
diff --git a/src/tools/tidy/src/deps.rs b/src/tools/tidy/src/deps.rs
index f9bf04626f7..286cfbf2629 100644
--- a/src/tools/tidy/src/deps.rs
+++ b/src/tools/tidy/src/deps.rs
@@ -65,7 +65,7 @@
     //("library/stdarch", EXCEPTIONS_STDARCH, None), // FIXME uncomment once rust-lang/stdarch#1462 has been synced back to the rust repo
     ("src/bootstrap", EXCEPTIONS_BOOTSTRAP, None),
     ("src/ci/docker/host-x86_64/test-various/uefi_qemu_test", EXCEPTIONS_UEFI_QEMU_TEST, None),
-    //("src/etc/test-float-parse", &[], None), // FIXME uncomment once all deps are vendored
+    ("src/etc/test-float-parse", EXCEPTIONS, None),
     ("src/tools/cargo", EXCEPTIONS_CARGO, None),
     //("src/tools/miri/test-cargo-miri", &[], None), // FIXME uncomment once all deps are vendored
     //("src/tools/miri/test_dependencies", &[], None), // FIXME uncomment once all deps are vendored