better option to store private key for frequent usage

[Sanjith Chungath]

Hi guys,
        Our application needs to use the private key to encrypt the data and
process it later. It will be encrypting the data very frequently. To avoid
very frequent file read we thought of storing the private key structure
(EVP_PKEY) in a static variable. So that we do not open the keystore and
read the key from it several times.

Is there any better solution. In general how applications handle this
situation.

-Thanks and Regards
-Sanjith.