High performance (SendFile API support and memory-mapped files).
高性能(支持SendFile API和内存映射文件)。
To help improve startup time, the JVM now works with memory-mapped files.
为了帮助改善启动时间，JVM现在和内存映射文件一起工作。
Memory-mapped files are an operating system feature that links a block of memory to a file.
内存映射文件是把一块内存连接到一个文件的操作系统特性。
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