Readme update.

diff --git a/readme.txt b/readme.txt
index f7fba065c9df9ef65b782d9ed6bbcc32e29712e7..17d7e5b3819c416493428ebc71f94f91ff0eaadf 100644 (file)
--- a/readme.txt
+++ b/readme.txt
@@ -3,10 +3,29 @@ About lwext4
 ============\r
 \r
 The main goal of the lwext4 project is to provide ext2/3/4 filesystem\r
-library for microcontrolers.\r
+library for microcontrolers with SD/MMC card support. Ext2/3/4, in my\r
+opinion is one of the best filesystem for SD/MMC.\r
 \r
 kostka.grzegorz@gmail.com\r
 \r
+Minimum memory requirements\r
+===========================\r
+\r
+.text           ~ 15KB\r
+.data + .bss ~ 8KB\r
+.stack          ~ 1KB-2KB (not tested yet)\r
+\r
+ext2/3/4 vs FAT32\r
+=================\r
+ext2/3/4 > FAT32\r
+ - fseek operation on big file in FAT32 is IO heavy\r
+ - ext2/3/4 HTREE directories operations are faster than FAT32  \r
+ - ext4 extents makes truncate/remove opertion really fast\r
+ - more at https://ext4.wiki.kernel.org/index.php/Ext4_Disk_Layout\r
+\r
+ext2/3/4 < FAT32\r
+ - FAT32 has smaller footprint\r
+\r
 Credits lwext4\r
 ==============\r
 \r