diff --git a/.github/workflows/codspeed.yml b/.github/workflows/codspeed.yml
new file mode 100644
index 0000000..54d0904
--- /dev/null
+++ b/.github/workflows/codspeed.yml
@@ -0,0 +1,37 @@
+name: CodSpeed
+
+on:
+  push:
+    branches:
+      - "main"
+  pull_request:
+  # `workflow_dispatch` allows CodSpeed to trigger backtest
+  # performance analysis in order to generate initial data.
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  id-token: write
+
+jobs:
+  codspeed:
+    name: Run benchmarks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Setup rust toolchain, cache and cargo-codspeed binary
+        uses: moonrepo/setup-rust@v0
+        with:
+          channel: stable
+          cache-target: release
+          bins: cargo-codspeed
+
+      - name: Build the benchmark target(s)
+        run: cargo codspeed build
+
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@v4
+        with:
+          mode: simulation
+          run: cargo codspeed run
diff --git a/Cargo.lock b/Cargo.lock
index 37df36e..63b5780 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11,24 +11,226 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
+[[package]]
+name = "anstyle"
+version = "1.0.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "940b3a0ca603d1eade50a4846a2afffd5ef57a9feac2c0e2ec2e14f9ead76000"
+
+[[package]]
+name = "anyhow"
+version = "1.0.102"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f202df86484c868dbad7eaa557ef785d5c66295e41b460ef922eca0723b842c"
+
 [[package]]
 name = "autocfg"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
 
+[[package]]
+name = "bitflags"
+version = "2.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "843867be96c8daad0d758b57df9392b6d8d271134fce549de6ce169ff98a92af"
+
+[[package]]
+name = "bumpalo"
+version = "3.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d20789868f4b01b2f2caec9f5c4e0213b41e3e5702a50157d699ae31ced2fcb"
+
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
+[[package]]
+name = "ciborium"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
+[[package]]
+name = "clap"
+version = "4.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b193af5b67834b676abd72466a96c1024e6a6ad978a1f484bd90b85c94041351"
+dependencies = [
+ "clap_builder",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "714a53001bf66416adb0e2ef5ac857140e7dc3a0c48fb28b2f10762fc4b5069f"
+dependencies = [
+ "anstyle",
+ "clap_lex",
+]
+
+[[package]]
+name = "clap_lex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
+
+[[package]]
+name = "codspeed"
+version = "2.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93f4cce9c27c49c4f101fffeebb1826f41a9df2e7498b7cd4d95c0658b796c6c"
+dependencies = [
+ "colored",
+ "libc",
+ "serde",
+ "serde_json",
+ "uuid",
+]
+
+[[package]]
+name = "codspeed-criterion-compat"
+version = "2.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3c23d880a28a2aab52d38ca8481dd7a3187157d0a952196b6db1db3c8499725"
+dependencies = [
+ "codspeed",
+ "codspeed-criterion-compat-walltime",
+ "colored",
+]
+
+[[package]]
+name = "codspeed-criterion-compat-walltime"
+version = "2.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b0a2f7365e347f4f22a67e9ea689bf7bc89900a354e22e26cf8a531a42c8fbb"
+dependencies = [
+ "anes",
+ "cast",
+ "ciborium",
+ "clap",
+ "codspeed",
+ "criterion-plot",
+ "is-terminal",
+ "itertools",
+ "num-traits",
+ "once_cell",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "colored"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
+dependencies = [
+ "lazy_static",
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools",
+]
+
+[[package]]
+name = "crossbeam-deque"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dd111b7b7f7d55b72c0a6ae361660ee5853c9af73f70c3c2ef6858b950e2e51"
+dependencies = [
+ "crossbeam-epoch",
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-epoch"
+version = "0.9.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d0a5c400df2834b80a4c3327b3aad3a4c4cd4de0629063962b03235697506a28"
+
+[[package]]
+name = "crunchy"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "460fbee9c2c2f33933d720630a6a0bac33ba7053db5344fac858d4b8952d77d5"
+
+[[package]]
+name = "either"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+
 [[package]]
 name = "equivalent"
 version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
 
+[[package]]
+name = "foldhash"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
+
 [[package]]
 name = "futures-core"
 version = "0.3.31"
@@ -72,18 +274,69 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "getrandom"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0de51e6874e94e7bf76d726fc5d13ba782deca734ff60d5bb2fb2607c7406555"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "r-efi",
+ "wasip2",
+ "wasip3",
+]
+
 [[package]]
 name = "glob"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0cc23270f6e1808e30a928bdc84dea0b9b4136a8bc82338574f23baf47bbd280"
 
+[[package]]
+name = "half"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea2d84b969582b4b1864a92dc5d27cd2b77b622a8d79306834f1be5ba20d84b"
+dependencies = [
+ "cfg-if",
+ "crunchy",
+ "zerocopy",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.15.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9229cfe53dfd69f0609a49f65461bd93001ea1ef889cd5529dd176593f5338a1"
+dependencies = [
+ "foldhash",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
+[[package]]
+name = "hermit-abi"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc0fef456e4baa96da950455cd02c081ca953b141298e41db3fc7e36b1da849c"
+
+[[package]]
+name = "id-arena"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3d3067d79b975e8844ca9eb072e16b31c3c1c36928edf9c6789548c524d0d954"
+
 [[package]]
 name = "indexmap"
 version = "2.11.4"
@@ -91,9 +344,37 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b0f83760fb341a774ed326568e19f5a863af4a952def8c39f9ab92fd95b88e5"
 dependencies = [
  "equivalent",
- "hashbrown",
+ "hashbrown 0.16.1",
+ "serde",
+ "serde_core",
 ]
 
+[[package]]
+name = "is-terminal"
+version = "0.4.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3640c1c38b8e4e43584d8df18be5fc6b0aa314ce6ebf51b53313d4306cca8e46"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "windows-sys 0.61.2",
+]
+
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
+[[package]]
+name = "itoa"
+version = "1.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682"
+
 [[package]]
 name = "jiff"
 version = "0.2.23"
@@ -106,7 +387,7 @@ dependencies = [
  "portable-atomic",
  "portable-atomic-util",
  "serde_core",
- "windows-sys",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -135,6 +416,34 @@ dependencies = [
  "jiff-tzdb",
 ]
 
+[[package]]
+name = "js-sys"
+version = "0.3.93"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "797146bb2677299a1eb6b7b50a890f4c361b29ef967addf5b2fa45dae1bb6d7d"
+dependencies = [
+ "once_cell",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "lazy_static"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+
+[[package]]
+name = "leb128fmt"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09edd9e8b54e49e587e4f6295a7d29c3ea94d469cb40ab8ca70b288248a81db2"
+
+[[package]]
+name = "libc"
+version = "0.2.183"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5b646652bf6661599e1da8901b3b9522896f01e736bad5f723fe7a3a27f899d"
+
 [[package]]
 name = "log"
 version = "0.4.28"
@@ -156,10 +465,23 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "once_cell"
+version = "1.21.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
+
+[[package]]
+name = "oorandom"
+version = "11.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d6790f58c7ff633d8771f42965289203411a5e5c68388703c06e14f24770b41e"
+
 [[package]]
 name = "parse_datetime"
 version = "0.15.0"
 dependencies = [
+ "codspeed-criterion-compat",
  "jiff",
  "num-traits",
  "rstest",
@@ -178,6 +500,34 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "plotters"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aeb6f403d7a4911efb1e33402027fc44f29b5bf6def3effcc22d7bb75f2b747"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df42e13c12958a16b3f7f4386b9ab1f3e7933914ecea48da7139435263a4172a"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51bae2ac328883f7acdfea3d66a7c35751187f870bc81f94563733a154d7a670"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "portable-atomic"
 version = "1.11.1"
@@ -193,6 +543,16 @@ dependencies = [
  "portable-atomic",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "3.4.0"
@@ -220,6 +580,32 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "r-efi"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8dcc9c7d52a811697d2151c701e0d08956f92b0e24136cf4cf27b57a6a0d9bf"
+
+[[package]]
+name = "rayon"
+version = "1.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "368f01d005bf8fd9b1206fb6fa653e6c4a81ceb1466406b81792d87c5677a58f"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22e18b0f0062d30d4230b2e85ff77fdfe4326feb054b9783a3460d8435c8ab91"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "regex"
 version = "1.12.2"
@@ -293,12 +679,37 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustversion"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b39cdef0fa800fc44525c84ccb54a029961a8215f9619753635a9c0d2538d46d"
+
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "semver"
 version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d767eb0aabc880b29956c35734170f26ed551a859dbd361d140cdbeca61ab1e2"
 
+[[package]]
+name = "serde"
+version = "1.0.228"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a8e94ea7f378bd32cbbd37198a4a91436180c5bb472411e48b5ec2e2124ae9e"
+dependencies = [
+ "serde_core",
+ "serde_derive",
+]
+
 [[package]]
 name = "serde_core"
 version = "1.0.228"
@@ -319,6 +730,19 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_json"
+version = "1.0.149"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83fc039473c5595ace860d8c4fafa220ff474b3fc6bfdb4293327f1a37e94d86"
+dependencies = [
+ "itoa",
+ "memchr",
+ "serde",
+ "serde_core",
+ "zmij",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.11"
@@ -336,6 +760,16 @@ dependencies = [
  "unicode-ident",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.7.1"
@@ -372,12 +806,164 @@ version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9312f7c4f6ff9069b165498234ce8be658059c6728633667c526e27dc2cf1df5"
 
+[[package]]
+name = "unicode-xid"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
+
+[[package]]
+name = "uuid"
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@@ -387,6 +973,70 @@ dependencies = [
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+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
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+
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+
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 name = "winnow"
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@@ -404,3 +1054,117 @@ checksum = "09dac053f1cd375980747450bfc7250c264eaae0583872e845c0c7cd578872b5"
 dependencies = [
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+
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diff --git a/Cargo.toml b/Cargo.toml
index aaa2160..ced3263 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,3 +15,10 @@ jiff = { version = "0.2.15", default-features = false, features = ["tz-system",
 
 [dev-dependencies]
 rstest = "0.26"
+
+[dev-dependencies.codspeed-criterion-compat]
+version = "2.7"
+
+[[bench]]
+name = "parse_datetime"
+harness = false
diff --git a/README.md b/README.md
index e64a77d..6b99e97 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![Crates.io](https://img.shields.io/crates/v/parse_datetime.svg)](https://crates.io/crates/parse_datetime)
 [![License](http://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/uutils/parse_datetime/blob/main/LICENSE)
 [![CodeCov](https://codecov.io/gh/uutils/parse_datetime/branch/main/graph/badge.svg)](https://codecov.io/gh/uutils/parse_datetime)
+[![CodSpeed](https://img.shields.io/endpoint?url=https://codspeed.io/badge.json)](https://codspeed.io/uutils/parse_datetime?utm_source=badge)
 
 A Rust crate for parsing human-readable relative time strings and
 human-readable datetime strings.
diff --git a/benches/parse_datetime.rs b/benches/parse_datetime.rs
new file mode 100644
index 0000000..92af93c
--- /dev/null
+++ b/benches/parse_datetime.rs
@@ -0,0 +1,115 @@
+use codspeed_criterion_compat::{criterion_group, criterion_main, Criterion};
+use jiff::Zoned;
+use parse_datetime::{parse_datetime, parse_datetime_at_date};
+
+fn bench_iso_datetime(c: &mut Criterion) {
+    c.bench_function("parse_iso_datetime", |b| {
+        b.iter(|| parse_datetime("2021-02-14 06:37:47 +0000"))
+    });
+}
+
+fn bench_iso_datetime_t_sep(c: &mut Criterion) {
+    c.bench_function("parse_iso_datetime_t_separator", |b| {
+        b.iter(|| parse_datetime("2021-02-14T22:37:47-0800"))
+    });
+}
+
+fn bench_date_only(c: &mut Criterion) {
+    c.bench_function("parse_date_only", |b| {
+        b.iter(|| parse_datetime("1997-01-01"))
+    });
+}
+
+fn bench_date_slash_format(c: &mut Criterion) {
+    c.bench_function("parse_date_slash_format", |b| {
+        b.iter(|| parse_datetime("05/07/1987"))
+    });
+}
+
+fn bench_epoch_timestamp(c: &mut Criterion) {
+    c.bench_function("parse_epoch_timestamp", |b| {
+        b.iter(|| parse_datetime("@1613371067"))
+    });
+}
+
+fn bench_relative_time(c: &mut Criterion) {
+    let now = Zoned::now();
+    c.bench_function("parse_relative_time", |b| {
+        b.iter(|| parse_datetime_at_date(now.clone(), "+3 days"))
+    });
+}
+
+fn bench_relative_time_complex(c: &mut Criterion) {
+    let now = Zoned::now();
+    c.bench_function("parse_relative_time_complex", |b| {
+        b.iter(|| parse_datetime_at_date(now.clone(), "1 year 3 months 2 days ago"))
+    });
+}
+
+fn bench_relative_keywords(c: &mut Criterion) {
+    c.bench_function("parse_yesterday", |b| {
+        b.iter(|| parse_datetime("yesterday"))
+    });
+    c.bench_function("parse_tomorrow", |b| b.iter(|| parse_datetime("tomorrow")));
+    c.bench_function("parse_now", |b| b.iter(|| parse_datetime("now")));
+}
+
+fn bench_weekday(c: &mut Criterion) {
+    c.bench_function("parse_weekday", |b| b.iter(|| parse_datetime("wednesday")));
+}
+
+fn bench_timezone_offset(c: &mut Criterion) {
+    c.bench_function("parse_timezone_offset", |b| {
+        b.iter(|| parse_datetime("UTC+07:00"))
+    });
+}
+
+fn bench_datetime_with_delta(c: &mut Criterion) {
+    c.bench_function("parse_datetime_with_delta", |b| {
+        b.iter(|| parse_datetime("1997-01-01 00:00:00 +0000 +1 year"))
+    });
+}
+
+fn bench_ctime_format(c: &mut Criterion) {
+    c.bench_function("parse_ctime_format", |b| {
+        b.iter(|| parse_datetime("Wed Jan  1 00:00:00 1997"))
+    });
+}
+
+fn bench_datetime_with_timezone_name(c: &mut Criterion) {
+    c.bench_function("parse_datetime_with_tz_name", |b| {
+        b.iter(|| parse_datetime("1997-01-19 08:17:48 BRT"))
+    });
+}
+
+fn bench_datetime_ending_in_z(c: &mut Criterion) {
+    c.bench_function("parse_datetime_ending_in_z", |b| {
+        b.iter(|| parse_datetime("2023-06-03 12:00:01Z"))
+    });
+}
+
+fn bench_invalid_input(c: &mut Criterion) {
+    c.bench_function("parse_invalid_input", |b| {
+        b.iter(|| parse_datetime("NotADate"))
+    });
+}
+
+criterion_group!(
+    benches,
+    bench_iso_datetime,
+    bench_iso_datetime_t_sep,
+    bench_date_only,
+    bench_date_slash_format,
+    bench_epoch_timestamp,
+    bench_relative_time,
+    bench_relative_time_complex,
+    bench_relative_keywords,
+    bench_weekday,
+    bench_timezone_offset,
+    bench_datetime_with_delta,
+    bench_ctime_format,
+    bench_datetime_with_timezone_name,
+    bench_datetime_ending_in_z,
+    bench_invalid_input,
+);
+criterion_main!(benches);