Use XXH3 for cache, hash table hashing

XXH3 is faster than both our CRC32c implementation as well
as DJB hash for hash table hashing, so meh, let's switch to
it.

1 files changed, 25 insertions, 0 deletions

diff --git a/CMake/FindXXHASH.cmake b/CMake/FindXXHASH.cmake
new file mode 100644
index 000000000..46d6fbd60
--- /dev/null
+++ b/CMake/FindXXHASH.cmake
@@ -0,0 +1,25 @@
+# - Try to find XXHASH
+# Once done, this will define
+#
+#  XXHASH_FOUND - system has XXHASH
+#  XXHASH_INCLUDE_DIRS - the XXHASH include directories
+#  XXHASH_LIBRARIES - the XXHASH library
+find_package(PkgConfig)
+
+pkg_check_modules(XXHASH_PKGCONF libxxhash)
+
+find_path(XXHASH_INCLUDE_DIRS
+  NAMES xxhash.h
+  PATHS ${XXHASH_PKGCONF_INCLUDE_DIRS}
+)
+
+
+find_library(XXHASH_LIBRARIES
+  NAMES xxhash
+  PATHS ${XXHASH_PKGCONF_LIBRARY_DIRS}
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(XXHASH DEFAULT_MSG XXHASH_INCLUDE_DIRS XXHASH_LIBRARIES)
+
+mark_as_advanced(XXHASH_INCLUDE_DIRS XXHASH_LIBRARIES)