1. Gauge: The gauge of a knitting machine refers to the number of needles per inch. Choose a machine with a gauge that is suitable for the type of gloves you plan to knit. Higher gauges are suitable for finer yarns, while lower gauges are best for thicker yarns.

2. Speed: Consider the speed of the machine and choose one that meets your needs. Look for a machine with a high-speed motor that can produce a large number of gloves per hour.

3. Number of Needles: The number of needles on a knitting machine determines the width of the fabric it can produce. Choose a machine with the appropriate number of needles for the size and style of gloves you want to knit.
   

4. Material: Choose a machine made of high-quality materials, such as aluminum or steel, that are durable and can withstand regular use.

5. Ease of Use: Look for a machine that is easy to use and has clear instructions. Consider a machine with a digital control panel that allows you to adjust the speed and tension of the machine.

6. Accessories: Look for a machine that comes with accessories such as different sizes of needle cylinders, yarn carriers, and tension units to allow for versatility in your knitting projects.

7. Brand and Customer Service: Choose a machine from a reputable brand that offers good customer service and support.

8. Price: High-speed glove knitting machines can range in price from several hundred dollars to several thousand dollars. Consider your budget and choose a machine that fits within your price range.

By considering these factors, you can choose a high-speed glove knitting machine that is efficient, durable, and easy to use, and meets your specific needs for knitting gloves.