diff --git a/lib/md5.c b/lib/md5.c
index 13f6275..194e980 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -221,11 +221,13 @@ process_partial_block:
 void *
 md5_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "md5", resblock, MD5_DIGEST_SIZE) == 0)
         return resblock;
     }
+#endif
 
   struct md5_ctx ctx;
 
diff --git a/lib/sha1.c b/lib/sha1.c
index 735de64..1ba0afb 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -209,11 +209,13 @@ sha1_stream (FILE *stream, void *resblock)
 void *
 sha1_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "sha1", resblock, SHA1_DIGEST_SIZE) == 0)
         return resblock;
     }
+#endif
 
   struct sha1_ctx ctx;
 
diff --git a/lib/sha256.c b/lib/sha256.c
index 78fc96e..0f3bfc5 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -273,12 +273,14 @@ sha224_stream (FILE *stream, void *resblock)
 void *
 sha256_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "sha256", resblock, SHA256_DIGEST_SIZE)
           == 0)
         return resblock;
     }
+#endif
 
   struct sha256_ctx ctx;
 
@@ -295,12 +297,14 @@ sha256_buffer (const char *buffer, size_t len, void *resblock)
 void *
 sha224_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "sha224", resblock, SHA224_DIGEST_SIZE)
           == 0)
         return resblock;
     }
+#endif
 
   struct sha256_ctx ctx;
 
diff --git a/lib/sha512.c b/lib/sha512.c
index 24cdd59..f73cbd6 100644
--- a/lib/sha512.c
+++ b/lib/sha512.c
@@ -281,12 +281,14 @@ sha384_stream (FILE *stream, void *resblock)
 void *
 sha512_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "sha512", resblock, SHA512_DIGEST_SIZE)
           == 0)
         return resblock;
     }
+#endif
 
   struct sha512_ctx ctx;
 
@@ -303,12 +305,14 @@ sha512_buffer (const char *buffer, size_t len, void *resblock)
 void *
 sha384_buffer (const char *buffer, size_t len, void *resblock)
 {
+#if 0 /* TODO: Determine list of platforms and break-even point.  */
   if (len >= 1)
     {
       if (afalg_buffer (buffer, len, "sha384", resblock, SHA384_DIGEST_SIZE)
           == 0)
         return resblock;
     }
+#endif
 
   struct sha512_ctx ctx;