其中一个原因是，程序员很难对并行进程的交互过程有全面和一致的认识。
One reason for this is the difficulty programmers have in obtaining a coherent and comprehensive view of the interactions of concurrent processes.
每个onbar命令的最大并行进程数由配置参数BAR_MAX_BACKUP控制。
The maximum number of parallel processes for each onbar command is controlled by the configuration parameter BAR_MAX_BACKUP.
有了微线程，我们就可能在目前中等性能的PC 机上运行数以万计的并行进程，还可以每秒钟几十万次地在上下文之间切换。
With microthreads, it is possible to run tens of thousands of parallel processes on a moderately capable modern PC, and to switch between contexts hundreds of thousands of times every second.
有了微线程，我们就可能在目前中等性能的PC 机上运行数以万计的并行进程，还可以每秒钟几十万次地在上下文之间切换。
With microthreads, it is possible to run tens of thousands of parallel processes on a moderately capable modern PC, and to switch between contexts hundreds of thousands of times every second.
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