http://www.cpubenchmark.net/laptop.html
YIKES!! 626 Passmark score. Yeah... that CPU scores a little low on the benchmarks. Looks like you will need a new laptop. Prices are coming down though. Should be able to find a good deal now.
If you can get at them in a store to compare them side-by-side, try to get access to the Windows Experience Index. You'll want to find something that scores at least a 7 in each test for CPU, Memory, and 3D Graphics. The scores are no longer accessible on the System Properties page in Win 8.1, but can get to them on a Win7/Win8.0 machine by going to System in Control Panel (or right-click Computer, and select Properties), and then clicking the hyperlink for "Windows Experience Index" next to the aggregate score.
For a Win8.1 box, the scores are in XML files nested in this path:
C:\Windows\Performance\WinSAT\DataStore
They will likely be just a string of text if you open them in a text editor. Right-click them and "Open with" a web browser (may have to click to choose default program, just clear the check box so it doesn't actually set the browser as default, but will add it to the list for Open With). In a browser it will be organized like an HTML file and the scores will be in a section about Metrics (<Memory Metrics>). Each score will have it's own XML file with a date stamp. If none are present, you can create a set by running the benchmark from an elevated CMD prompt:
winsat prepop