diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
index bbf00705a..9922e96e4 100644
--- a/benchmark/CMakeLists.txt
+++ b/benchmark/CMakeLists.txt
@@ -32,6 +32,10 @@ if(SOURCEMETA_CORE_HTML)
   list(APPEND BENCHMARK_SOURCES html.cc)
 endif()
 
+if(SOURCEMETA_CORE_GZIP)
+  list(APPEND BENCHMARK_SOURCES gzip.cc)
+endif()
+
 if(BENCHMARK_SOURCES)
   sourcemeta_googlebenchmark(NAMESPACE sourcemeta PROJECT core
     SOURCES ${BENCHMARK_SOURCES})
@@ -78,6 +82,11 @@ if(BENCHMARK_SOURCES)
       PRIVATE sourcemeta::core::html)
   endif()
 
+  if(SOURCEMETA_CORE_GZIP)
+    target_link_libraries(sourcemeta_core_benchmark
+      PRIVATE sourcemeta::core::gzip sourcemeta::core::io)
+  endif()
+
   add_custom_target(benchmark_all
     COMMAND sourcemeta_core_benchmark
     DEPENDS sourcemeta_core_benchmark
diff --git a/benchmark/files/iso_language_2023_set_3_locations.json.gz b/benchmark/files/iso_language_2023_set_3_locations.json.gz
new file mode 100644
index 000000000..6bf023c9f
Binary files /dev/null and b/benchmark/files/iso_language_2023_set_3_locations.json.gz differ
diff --git a/benchmark/files/iso_language_2023_set_3_schema.json.gz b/benchmark/files/iso_language_2023_set_3_schema.json.gz
new file mode 100644
index 000000000..91bc97d67
Binary files /dev/null and b/benchmark/files/iso_language_2023_set_3_schema.json.gz differ
diff --git a/benchmark/gzip.cc b/benchmark/gzip.cc
new file mode 100644
index 000000000..8b629d7f1
--- /dev/null
+++ b/benchmark/gzip.cc
@@ -0,0 +1,72 @@
+#include <benchmark/benchmark.h>
+
+#include <sourcemeta/core/gzip.h>
+#include <sourcemeta/core/io.h>
+
+#include <cstdint>    // std::uint8_t
+#include <filesystem> // std::filesystem
+
+static void
+GZIP_Compress_ISO_Language_Set_3_Locations(benchmark::State &state) {
+  const sourcemeta::core::FileView view{
+      std::filesystem::path{CURRENT_DIRECTORY} / "files" /
+      "iso_language_2023_set_3_locations.json.gz"};
+  const auto contents{
+      sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size())};
+
+  for (auto _ : state) {
+    auto result{sourcemeta::core::gzip(
+        reinterpret_cast<const std::uint8_t *>(contents.data()),
+        contents.size())};
+    benchmark::DoNotOptimize(result);
+  }
+}
+
+static void
+GZIP_Decompress_ISO_Language_Set_3_Locations(benchmark::State &state) {
+  const sourcemeta::core::FileView view{
+      std::filesystem::path{CURRENT_DIRECTORY} / "files" /
+      "iso_language_2023_set_3_locations.json.gz"};
+  const auto output_hint{
+      sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size()).size()};
+
+  for (auto _ : state) {
+    auto result{sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size(),
+                                         output_hint)};
+    benchmark::DoNotOptimize(result);
+  }
+}
+
+static void GZIP_Compress_ISO_Language_Set_3_Schema(benchmark::State &state) {
+  const sourcemeta::core::FileView view{
+      std::filesystem::path{CURRENT_DIRECTORY} / "files" /
+      "iso_language_2023_set_3_schema.json.gz"};
+  const auto contents{
+      sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size())};
+
+  for (auto _ : state) {
+    auto result{sourcemeta::core::gzip(
+        reinterpret_cast<const std::uint8_t *>(contents.data()),
+        contents.size())};
+    benchmark::DoNotOptimize(result);
+  }
+}
+
+static void GZIP_Decompress_ISO_Language_Set_3_Schema(benchmark::State &state) {
+  const sourcemeta::core::FileView view{
+      std::filesystem::path{CURRENT_DIRECTORY} / "files" /
+      "iso_language_2023_set_3_schema.json.gz"};
+  const auto output_hint{
+      sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size()).size()};
+
+  for (auto _ : state) {
+    auto result{sourcemeta::core::gunzip(view.as<std::uint8_t>(), view.size(),
+                                         output_hint)};
+    benchmark::DoNotOptimize(result);
+  }
+}
+
+BENCHMARK(GZIP_Compress_ISO_Language_Set_3_Locations);
+BENCHMARK(GZIP_Decompress_ISO_Language_Set_3_Locations);
+BENCHMARK(GZIP_Compress_ISO_Language_Set_3_Schema);
+BENCHMARK(GZIP_Decompress_ISO_Language_Set_3_Schema);