diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,10 @@
 Changelog for tmp-postgres
 
+1.19.0.0
+  #154 Change 'createDefaultCacheConfig` to `defaultCacheConfig`
+
 1.18.0.0
-  #143 Remove the the withNewDb API
+  #143 Remove the withNewDb API
 
 1.17.0.0
   #156 Deprecate `NewDb` functions.
diff --git a/benchmark/Main.hs b/benchmark/Main.hs
--- a/benchmark/Main.hs
+++ b/benchmark/Main.hs
@@ -45,8 +45,7 @@
 
 setupCache :: IO (Bool, CompleteDirectoryType)
 setupCache = do
-  defCacheConfig <- createDefaultCacheConfig
-  cacheInfo <- setupInitDbCache defCacheConfig
+  cacheInfo <- setupInitDbCache defaultCacheConfig
   void (withConfig (silentConfig <> toCacheConfig cacheInfo) (const $ pure ()))
   pure cacheInfo
 
diff --git a/src/Database/Postgres/Temp.hs b/src/Database/Postgres/Temp.hs
--- a/src/Database/Postgres/Temp.hs
+++ b/src/Database/Postgres/Temp.hs
@@ -85,10 +85,14 @@
   , standardProcessConfig
   , silentConfig
   , silentProcessConfig
+  , defaultCacheConfig
   , configFromSavePoint
   -- ** Custom Config builder helpers
   , optionsToDefaultConfig
   -- ** Configuration Types
+  -- *** 'CacheConfig'
+  , CacheConfig (..)
+  -- *** General Configuration Types
   , module Database.Postgres.Temp.Config
   ) where
 import Database.Postgres.Temp.Internal
diff --git a/src/Database/Postgres/Temp/Config.hs b/src/Database/Postgres/Temp/Config.hs
--- a/src/Database/Postgres/Temp/Config.hs
+++ b/src/Database/Postgres/Temp/Config.hs
@@ -12,7 +12,8 @@
     functions.
 |-}
 module Database.Postgres.Temp.Config
-  ( Config (..)
+  ( -- ** 'Config'
+    Config (..)
   , prettyPrintConfig
     -- *** 'Config' Lenses
   , planL
@@ -59,6 +60,8 @@
   , keyBasedL
   -- ** 'DirectoryType'
   , DirectoryType (..)
+  -- ** 'CompleteDirectoryType
+  , CompleteDirectoryType (..)
   -- ** 'Accum'
   , Accum (..)
   -- ** 'Logger'
diff --git a/src/Database/Postgres/Temp/Internal.hs b/src/Database/Postgres/Temp/Internal.hs
--- a/src/Database/Postgres/Temp/Internal.hs
+++ b/src/Database/Postgres/Temp/Internal.hs
@@ -16,6 +16,7 @@
 import qualified Database.PostgreSQL.Simple as PG
 import qualified Database.PostgreSQL.Simple.Options as Client
 import           System.Exit (ExitCode(..))
+import           System.IO.Unsafe (unsafePerformIO)
 import           System.Process
 import           Text.PrettyPrint.ANSI.Leijen hiding ((<$>))
 
@@ -458,19 +459,8 @@
   --   and sets this to 'True' if it does.
   }
 
-{-|
-'createDefaultCacheConfig' attempts to determine if the @cp@ on the path
-supports \"copy on write\" flags and if it does, sets 'cacheUseCopyOnWrite'
-to 'True'.
-
-It sets 'cacheDirectoryType' to 'Permanent' @~\/.tmp-postgres@ and
-'cacheTemporaryDirectory' to @\/tmp@ (but this is not used when
-'Permanent' is set).
-
-@since 1.15.1.0
--}
-createDefaultCacheConfig :: IO CacheConfig
-createDefaultCacheConfig = do
+cowCheck :: Bool
+cowCheck = unsafePerformIO $ do
   let
 #ifdef darwin_HOST_OS
     cpFlag = "-c"
@@ -481,12 +471,29 @@
   -- if the flags do not exist we get a message like "cp: illegal option"
   let usage = "usage:" -- macos
       missingFile = "cp: missing file operand" -- linux
-      cacheUseCopyOnWrite = usage ==  take (length usage) errorOutput
-        || missingFile ==  take (length missingFile) errorOutput
-      cacheDirectoryType = Permanent "~/.tmp-postgres"
-      cacheTemporaryDirectory = "/tmp"
-  pure CacheConfig {..}
+  pure $ usage ==  take (length usage) errorOutput
+       || missingFile ==  take (length missingFile) errorOutput
+{-# NOINLINE cowCheck #-}
 
+{-|
+'defaultCacheConfig' attempts to determine if the @cp@ on the path
+supports \"copy on write\" flags and if it does, sets 'cacheUseCopyOnWrite'
+to 'True'.
+
+It sets 'cacheDirectoryType' to 'Permanent' @~\/.tmp-postgres@ and
+'cacheTemporaryDirectory' to @\/tmp@ (but this is not used when
+'Permanent' is set).
+
+@since 1.19.0.0
+-}
+defaultCacheConfig :: CacheConfig
+defaultCacheConfig = CacheConfig
+  { cacheDirectoryType = Permanent "~/.tmp-postgres"
+  , cacheTemporaryDirectory = "/tmp"
+  , cacheUseCopyOnWrite = cowCheck
+  }
+
+
 -- | Setup the @initdb@ cache folder.
 setupInitDbCache
   :: CacheConfig
@@ -530,13 +537,12 @@
 
 {-|
 Equivalent to 'withDbCacheConfig' with the 'CacheConfig'
-'createDefaultCacheConfig' makes.
+'defaultCacheConfig' makes.
 
 @since 1.15.1.0
 -}
 withDbCache :: ((Bool, CompleteDirectoryType) -> IO a) -> IO a
-withDbCache action =
-  flip withDbCacheConfig action =<< createDefaultCacheConfig
+withDbCache = withDbCacheConfig defaultCacheConfig
 
 {-|
 Helper to make a 'Config' out of caching info.
@@ -564,12 +570,11 @@
   -> IO (Either StartError CompleteDirectoryType)
 takeSnapshot directoryType db = try $ do
   throwIfNotSuccess id =<< stopPostgresGracefully db
-  cow <- cacheUseCopyOnWrite <$> createDefaultCacheConfig
   let
 #ifdef darwin_HOST_OS
-    cpFlags = if cow then "cp -Rc " else "cp -R "
+    cpFlags = if cowCheck then "cp -Rc " else "cp -R "
 #else
-    cpFlags = if cow then "cp -R --reflink=auto " else "cp -R "
+    cpFlags = if cowCheck then "cp -R --reflink=auto " else "cp -R "
 #endif
   bracketOnError
     (setupDirectoryType
@@ -619,13 +624,12 @@
 -}
 configFromSavePoint :: FilePath -> IO Config
 configFromSavePoint savePointPath = do
-  cow <- cacheUseCopyOnWrite <$> createDefaultCacheConfig
   pure mempty
     { plan = mempty
         { copyConfig = pure $ pure CopyDirectoryCommand
             { sourceDirectory = savePointPath
             , destinationDirectory = Nothing
-            , useCopyOnWrite = cow
+            , useCopyOnWrite = cowCheck
             }
         , initDbConfig = Zlich
         }
diff --git a/tmp-postgres.cabal b/tmp-postgres.cabal
--- a/tmp-postgres.cabal
+++ b/tmp-postgres.cabal
@@ -1,5 +1,5 @@
 name:                tmp-postgres
-version:             1.18.0.0
+version:             1.19.0.0
 synopsis: Start and stop a temporary postgres
 description: Start and stop a temporary postgres. See README.md
 homepage:            https://github.com/jfischoff/tmp-postgres#readme