CacheFlow (CFLO) was up 10.1% in preopen Island trading after posting a fourth-quarter loss of 35 cents a share, beating Street estimates of 39 cents but wider than the year-ago loss of 20 cents. The maker of Web site performance-enhancing products said sales totaled $21.5 million, compared with $12.8 million in the year-ago period.

CacheFlow said it expects revenue to come in flat in the current quarter, but sees 10% to 15% sequential revenue growth in subsequent quarters.