diff --git a/.gitignore b/.gitignore
index b84a1cfe9f5..dcefbc62c70 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,7 @@ tex/*/out
 *.dot
 *.rs.bk
 .vscode
+*.mm_profdata
+perf.data
+perf.data.old
+flamegraph.svg
diff --git a/bench-cargo-miri/backtraces/Cargo.lock b/bench-cargo-miri/backtraces/Cargo.lock
new file mode 100644
index 00000000000..375b129a7e5
--- /dev/null
+++ b/bench-cargo-miri/backtraces/Cargo.lock
@@ -0,0 +1,94 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "addr2line"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9ecd88a8c8378ca913a680cd98f0f13ac67383d35993f86c90a70e3f137816b"
+dependencies = [
+ "gimli",
+]
+
+[[package]]
+name = "adler"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
+
+[[package]]
+name = "backtrace"
+version = "0.3.65"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11a17d453482a265fd5f8479f2a3f405566e6ca627837aaddb85af8b1ab8ef61"
+dependencies = [
+ "addr2line",
+ "cc",
+ "cfg-if",
+ "libc",
+ "miniz_oxide",
+ "object",
+ "rustc-demangle",
+]
+
+[[package]]
+name = "backtraces"
+version = "0.1.0"
+dependencies = [
+ "backtrace",
+]
+
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "gimli"
+version = "0.26.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78cc372d058dcf6d5ecd98510e7fbc9e5aec4d21de70f65fea8fecebcd881bd4"
+
+[[package]]
+name = "libc"
+version = "0.2.126"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349d5a591cd28b49e1d1037471617a32ddcda5731b99419008085f72d5a53836"
+
+[[package]]
+name = "memchr"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+
+[[package]]
+name = "miniz_oxide"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f5c75688da582b8ffc1f1799e9db273f32133c49e048f614d22ec3256773ccc"
+dependencies = [
+ "adler",
+]
+
+[[package]]
+name = "object"
+version = "0.28.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e42c982f2d955fac81dd7e1d0e1426a7d702acd9c98d19ab01083a6a0328c424"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "rustc-demangle"
+version = "0.1.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ef03e0a2b150c7a90d01faf6254c9c48a41e95fb2a8c2ac1c6f0d2b9aefc342"
diff --git a/bench-cargo-miri/backtraces/Cargo.toml b/bench-cargo-miri/backtraces/Cargo.toml
new file mode 100644
index 00000000000..1ba96b19395
--- /dev/null
+++ b/bench-cargo-miri/backtraces/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "backtraces"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+backtrace = "0.3.65"
diff --git a/bench-cargo-miri/backtraces/src/main.rs b/bench-cargo-miri/backtraces/src/main.rs
new file mode 100644
index 00000000000..eba51c60dbc
--- /dev/null
+++ b/bench-cargo-miri/backtraces/src/main.rs
@@ -0,0 +1,29 @@
+//! Extracted from the backtrace crate's test test_frame_conversion
+
+use backtrace::{Backtrace, BacktraceFrame};
+use std::fmt::Write;
+
+fn main() {
+    let mut frames = vec![];
+    backtrace::trace(|frame| {
+        let converted = BacktraceFrame::from(frame.clone());
+        frames.push(converted);
+        true
+    });
+
+    let mut manual = Backtrace::from(frames);
+    manual.resolve();
+    let frames = manual.frames();
+
+    let mut output = String::new();
+    for frame in frames {
+        // Originally these were println! but we'd prefer our benchmarks to not emit a lot of
+        // output to stdout/stderr. Unfortunately writeln! to a String is faster, but we still
+        // manage to exercise interesting code paths in Miri.
+        writeln!(output, "{:?}", frame.ip()).unwrap();
+        writeln!(output, "{:?}", frame.symbol_address()).unwrap();
+        writeln!(output, "{:?}", frame.module_base_address()).unwrap();
+        writeln!(output, "{:?}", frame.symbols()).unwrap();
+    }
+    drop(output);
+}
diff --git a/bench-cargo-miri/mse/Cargo.lock b/bench-cargo-miri/mse/Cargo.lock
new file mode 100644
index 00000000000..d2b1aa341bb
--- /dev/null
+++ b/bench-cargo-miri/mse/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "mse"
+version = "0.1.0"
diff --git a/bench-cargo-miri/serde1/Cargo.lock b/bench-cargo-miri/serde1/Cargo.lock
new file mode 100644
index 00000000000..48750576135
--- /dev/null
+++ b/bench-cargo-miri/serde1/Cargo.lock
@@ -0,0 +1,89 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cargo-miri-test"
+version = "0.1.0"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "112c678d4050afce233f4f2852bb2eb519230b3cf12f33585275537d7e41578d"
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.39"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1feb54ed693b93a84e14094943b84b7c4eae204c512b7ccb95ab0c66d278ad1"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "ryu"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3f6f92acf49d1b98f7a81226834412ada05458b7364277387724a237f062695"
+
+[[package]]
+name = "serde"
+version = "1.0.137"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61ea8d54c77f8315140a05f4c7237403bf38b72704d031543aa1d16abbf517d1"
+dependencies = [
+ "serde_derive",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.137"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f26faba0c3959972377d3b2d306ee9f71faee9714294e41bb777f83f88578be"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_json"
+version = "1.0.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b7ce2b32a1aed03c558dc61a5cd328f15aff2dbc17daad8fb8af04d2100e15c"
+dependencies = [
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.96"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0748dd251e24453cb8717f0354206b91557e4ec8703673a4b30208f2abaf1ebf"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d22af068fba1eb5edcb4aea19d382b2a3deb4c8f9d475c589b6ada9e0fd493ee"
diff --git a/bench-cargo-miri/unicode/Cargo.lock b/bench-cargo-miri/unicode/Cargo.lock
new file mode 100644
index 00000000000..80d013b7d6d
--- /dev/null
+++ b/bench-cargo-miri/unicode/Cargo.lock
@@ -0,0 +1,16 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "unicode"
+version = "0.1.0"
+dependencies = [
+ "unicode-xid",
+]
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "957e51f3646910546462e67d5f7599b9e4fb8acdd304b087a6494730f9eebf04"
diff --git a/bench-cargo-miri/unicode/Cargo.toml b/bench-cargo-miri/unicode/Cargo.toml
new file mode 100644
index 00000000000..7e8708b03f1
--- /dev/null
+++ b/bench-cargo-miri/unicode/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "unicode"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+unicode-xid = "0.2.3"
diff --git a/bench-cargo-miri/unicode/src/main.rs b/bench-cargo-miri/unicode/src/main.rs
new file mode 100644
index 00000000000..3f0ee5ecf6a
--- /dev/null
+++ b/bench-cargo-miri/unicode/src/main.rs
@@ -0,0 +1,20 @@
+//! Extracted from the unicode-xid exhaustive test all_valid_chars_do_not_panic_for_is_xid_continue
+
+use unicode_xid::UnicodeXID;
+
+/// A `char` in Rust is a Unicode Scalar Value
+///
+/// See: http://www.unicode.org/glossary/#unicode_scalar_value
+fn all_valid_chars() -> impl Iterator<Item = char> {
+    (0u32..=0xD7FF).chain(0xE000u32..=0x10FFFF).map(|u| {
+        core::convert::TryFrom::try_from(u)
+            .expect("The selected range should be infallible if the docs match impl")
+    })
+}
+
+fn main() {
+    // Take only the first few chars because we don't want to wait all day
+    for c in all_valid_chars().take(2_000) {
+        let _ = UnicodeXID::is_xid_continue(c);
+    }
+}