IBM JDK SHA1PRNG 算法比 IBMSecureRandom 慢
IBM JDK SHA1PRNG 算法比 IBMSecureRandom 慢java.security.SecureRandom random = java.security.SecureRandom.getInstance("SHA1PRNG");
换成
java.security.SecureRandom random = java.security.SecureRandom.getInstance("IBMSecureRandom");
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