我已经编写了将多个.eml文件转换为单个.pst文件的代码。 我已经用JAVA编写了它，它是单线程的。
现在，有2000个.eml文件。
Machine1 CPU配置：
[root@localhost ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 56
On-line CPU(s) list: 0-55
Thread(s) per core: 2
Core(s) per socket: 14
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-2683 v3 @ 2.00GHz
Stepping: 2
CPU MHz: 2644.843
BogoMIPS: 4004.37
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 35840K
NUMA node0 CPU(s): 0-13,28-41
NUMA node1 CPU(s): 14-27,42-55
Machine2 CPU配置：
[root@localhost ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 23
Model name: Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz
Stepping: 10
CPU MHz: 1596.000
BogoMIPS: 5851.88
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 3072K
NUMA node0 CPU(s): 0,1
在machine1上，需要5个小时以上才能完成。即使有2 14个核心CPU。
在machine2上，它在一小时内完成。