diff --git a/tcshrc.prompt.final b/tcshrc.prompt.final
index 1a4b385..43362e5 100644
--- a/tcshrc.prompt.final
+++ b/tcshrc.prompt.final
@@ -36,25 +36,29 @@ set prompt_segment_kinds=( \
 	prompt \
  )
 
-foreach kind ( ${prompt_segment_kinds} )
-	eval 'echo $?curr_'"${kind}"'_color' >& /dev/null
-	_debug "Eval of ${kind}"
-	if( $? == 0 ) then
-		eval "set curr_${kind}_color=impossible"
-	endif
-	eval 'set __new_this_color="${'"${kind}"'_color}"'
-	eval 'set __curr_this_color="${curr_'"${kind}"'_color}"'
-	if( "${__new_this_color}" != ${__curr_this_color} ) then
+# The algorithm is duplicated with less branching to make startup a bit faster.
+if ( ! $?cshenv_prompt_first_cache ) then
+	foreach kind ( ${prompt_segment_kinds} )
+		eval 'set __new_this_color="${'"${kind}"'_color}"'
 		eval 'set curr_'"${kind}"'_color="'${__new_this_color}'"'
 		set __this_color_seq="%{[`__build_sgr_code no-csi reset ${__new_this_color}`m%}"
 		eval 'set '"${kind}"'_color_seq="'"${__this_color_seq}"'"'
-	endif
-end
+	end
+	set cshenv_prompt_first_cache=1
+else
+	foreach kind ( ${prompt_segment_kinds} )
+		eval 'set __new_this_color="${'"${kind}"'_color}"'
+		eval 'set __curr_this_color="${curr_'"${kind}"'_color}"'
+		if( "${__new_this_color}" == "${__curr_this_color}" ) continue
+
+		eval 'set curr_'"${kind}"'_color="'${__new_this_color}'"'
+		set __this_color_seq="%{[`__build_sgr_code no-csi reset ${__new_this_color}`m%}"
+		eval 'set '"${kind}"'_color_seq="'"${__this_color_seq}"'"'
+	end
+endif
 
 _debug "Done with color cacheing loop"
 	
-
-
 _debug "Dynamic color loading processed..."