AWS Lambda now supports SnapStart for Java functions in 6 additional AWS Regions: Asia Pacific (Mumbai), Asia Pacific (Seoul), Canada (Central), Europe (London), South America (São Paulo), US West (N. California). AWS Lambda SnapStart for Java delivers up to 10x faster function startup performance at no extra cost. Lambda SnapStart is a performance optimization that makes it easier for you to build highly responsive and scalable Java applications using AWS Lambda, without having to provision resources or spend time and effort implementing complex performance optimizations.
Source:: Amazon AWS