| Class | Rating | Complexity | Lines of code |
|---|---|---|---|
| SimplePie_Misc | 1,034 | 1,898 | |
| SimplePie_Item | 527 | 2,352 | |
| SimplePie | 425 | 1,690 | |
| UCFeed | 262 | 1,270 | |
| SimplePie_Enclosure | 177 | 767 | |
| SimplePie_Source | 121 | 483 | |
| WPOTools | 97 | 245 | |
| SimplePie_Sanitize | 67 | 257 | |
| SimplePie_Content_Type_Sniffer | 58 | 205 | |
| SimplePie_Locator | 57 | 205 | |
| SimplePie_Parse_Date | 54 | 289 | |
| SimplePie_Parser | 53 | 219 | |
| SimplePie_File | 53 | 182 | |
| SimplePie_HTTP_Parser | 48 | 213 | |
| SimplePie_XML_Declaration_Parser | 37 | 194 | |
| SimplePie_Decode_HTML_Entities | 29 | 115 | |
| XMLParser | 23 | 62 | |
| SimplePie_Cache_File | 18 | 59 | |
| SimplePie_Caption | 12 | 60 | |
| SimplePie_Credit | 8 | 38 | |
| SimplePie_Restriction | 8 | 38 | |
| SimplePie_Category | 8 | 38 | |
| SimplePie_Author | 8 | 38 | |
| SimplePie_Copyright | 6 | 27 | |
| SimplePie_Rating | 6 | 27 | |
| SimplePie_Cache | 2 | 6 |