OK, eu percebi isso. Este é o imposto "diretório pessoal criptografado".
Voltei a executar o teste no meu notebook, dentro e fora da minha casa criptografada e obtive estes resultados:
Página inicial criptografada:
BYTE UNIX Benchmarks (Version 5.1.3)
System: thx2219: GNU/Linux
OS: GNU/Linux -- 3.5.0-48-generic -- #72~precise1-Ubuntu SMP Tue Mar 11 20:08:23 UTC 2014
Machine: i686 (i386)
Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8")
CPU 0: Intel(R) Core(TM)2 Duo CPU T5270 @ 1.40GHz (2793.2 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT
CPU 1: Intel(R) Core(TM)2 Duo CPU T5270 @ 1.40GHz (2793.2 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT
09:23:29 up 6 min, 2 users, load average: 1.90, 0.99, 0.42; runlevel 2
------------------------------------------------------------------------
Benchmark Run: Fri Jun 20 2014 09:23:29 - 09:51:35
2 CPUs in system; running 1 parallel copy of tests
Dhrystone 2 using register variables 8748168.4 lps (10.0 s, 7 samples)
Double-Precision Whetstone 1670.2 MWIPS (10.1 s, 7 samples)
Execl Throughput 956.3 lps (29.8 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 11428.0 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 2883.5 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 43587.0 KBps (30.0 s, 2 samples)
Pipe Throughput 438447.2 lps (10.0 s, 7 samples)
Pipe-based Context Switching 22667.8 lps (10.0 s, 7 samples)
Process Creation 2913.5 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 2979.9 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 666.9 lpm (60.1 s, 2 samples)
System Call Overhead 911599.9 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 8748168.4 749.6
Double-Precision Whetstone 55.0 1670.2 303.7
Execl Throughput 43.0 956.3 222.4
File Copy 1024 bufsize 2000 maxblocks 3960.0 11428.0 28.9
File Copy 256 bufsize 500 maxblocks 1655.0 2883.5 17.4
File Copy 4096 bufsize 8000 maxblocks 5800.0 43587.0 75.1
Pipe Throughput 12440.0 438447.2 352.4
Pipe-based Context Switching 4000.0 22667.8 56.7
Process Creation 126.0 2913.5 231.2
Shell Scripts (1 concurrent) 42.4 2979.9 702.8
Shell Scripts (8 concurrent) 6.0 666.9 1111.5
System Call Overhead 15000.0 911599.9 607.7
========
System Benchmarks Index Score 200.4
------------------------------------------------------------------------
Benchmark Run: Fri Jun 20 2014 09:51:35 - 10:19:56
2 CPUs in system; running 2 parallel copies of tests
Dhrystone 2 using register variables 14400540.8 lps (10.0 s, 7 samples)
Double-Precision Whetstone 2977.2 MWIPS (10.2 s, 7 samples)
Execl Throughput 3468.0 lps (29.8 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 10015.0 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 2525.0 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 38482.5 KBps (30.0 s, 2 samples)
Pipe Throughput 774637.1 lps (10.0 s, 7 samples)
Pipe-based Context Switching 181309.2 lps (10.0 s, 7 samples)
Process Creation 10315.5 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 5067.0 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 670.5 lpm (60.1 s, 2 samples)
System Call Overhead 1551102.1 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 14400540.8 1234.0
Double-Precision Whetstone 55.0 2977.2 541.3
Execl Throughput 43.0 3468.0 806.5
File Copy 1024 bufsize 2000 maxblocks 3960.0 10015.0 25.3
File Copy 256 bufsize 500 maxblocks 1655.0 2525.0 15.3
File Copy 4096 bufsize 8000 maxblocks 5800.0 38482.5 66.3
Pipe Throughput 12440.0 774637.1 622.7
Pipe-based Context Switching 4000.0 181309.2 453.3
Process Creation 126.0 10315.5 818.7
Shell Scripts (1 concurrent) 42.4 5067.0 1195.0
Shell Scripts (8 concurrent) 6.0 670.5 1117.4
System Call Overhead 15000.0 1551102.1 1034.1
========
System Benchmarks Index Score 357.8
Dir. não criptografado:
BYTE UNIX Benchmarks (Version 5.1.3)
System: thx2219: GNU/Linux
OS: GNU/Linux -- 3.5.0-51-generic -- #77~precise1-Ubuntu SMP Thu Jun 5 00:47:34 UTC 2014
Machine: i686 (i386)
Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8")
CPU 0: Intel(R) Core(TM)2 Duo CPU T5270 @ 1.40GHz (2792.8 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT
CPU 1: Intel(R) Core(TM)2 Duo CPU T5270 @ 1.40GHz (2792.8 bogomips)
Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT
13:02:27 up 7 min, 2 users, load average: 0.50, 0.31, 0.17; runlevel 2
------------------------------------------------------------------------
Benchmark Run: Fri Jun 20 2014 13:02:27 - 13:30:28
2 CPUs in system; running 1 parallel copy of tests
Dhrystone 2 using register variables 8578638.6 lps (10.0 s, 7 samples)
Double-Precision Whetstone 1671.1 MWIPS (10.2 s, 7 samples)
Execl Throughput 962.5 lps (29.9 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 261941.5 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 80624.9 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 613075.2 KBps (30.0 s, 2 samples)
Pipe Throughput 437733.6 lps (10.0 s, 7 samples)
Pipe-based Context Switching 21707.5 lps (10.0 s, 7 samples)
Process Creation 2925.7 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 3287.6 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 735.4 lpm (60.0 s, 2 samples)
System Call Overhead 911615.6 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 8578638.6 735.1
Double-Precision Whetstone 55.0 1671.1 303.8
Execl Throughput 43.0 962.5 223.8
File Copy 1024 bufsize 2000 maxblocks 3960.0 261941.5 661.5
File Copy 256 bufsize 500 maxblocks 1655.0 80624.9 487.2
File Copy 4096 bufsize 8000 maxblocks 5800.0 613075.2 1057.0
Pipe Throughput 12440.0 437733.6 351.9
Pipe-based Context Switching 4000.0 21707.5 54.3
Process Creation 126.0 2925.7 232.2
Shell Scripts (1 concurrent) 42.4 3287.6 775.4
Shell Scripts (8 concurrent) 6.0 735.4 1225.6
System Call Overhead 15000.0 911615.6 607.7
========
System Benchmarks Index Score 433.1
------------------------------------------------------------------------
Benchmark Run: Fri Jun 20 2014 13:30:28 - 13:58:32
2 CPUs in system; running 2 parallel copies of tests
Dhrystone 2 using register variables 15140050.1 lps (10.0 s, 7 samples)
Double-Precision Whetstone 2976.3 MWIPS (10.2 s, 7 samples)
Execl Throughput 3485.0 lps (29.9 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 386644.8 KBps (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 119772.7 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 859500.6 KBps (30.0 s, 2 samples)
Pipe Throughput 785277.0 lps (10.0 s, 7 samples)
Pipe-based Context Switching 180743.2 lps (10.0 s, 7 samples)
Process Creation 10408.1 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 5567.7 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 743.1 lpm (60.1 s, 2 samples)
System Call Overhead 1549181.8 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 15140050.1 1297.3
Double-Precision Whetstone 55.0 2976.3 541.1
Execl Throughput 43.0 3485.0 810.5
File Copy 1024 bufsize 2000 maxblocks 3960.0 386644.8 976.4
File Copy 256 bufsize 500 maxblocks 1655.0 119772.7 723.7
File Copy 4096 bufsize 8000 maxblocks 5800.0 859500.6 1481.9
Pipe Throughput 12440.0 785277.0 631.3
Pipe-based Context Switching 4000.0 180743.2 451.9
Process Creation 126.0 10408.1 826.0
Shell Scripts (1 concurrent) 42.4 5567.7 1313.1
Shell Scripts (8 concurrent) 6.0 743.1 1238.6
System Call Overhead 15000.0 1549181.8 1032.8
========
System Benchmarks Index Score 886.6
A moral da história para mim é que, embora as casas criptografadas sejam boas, lembre-se de não usá-las para tarefas com uso intensivo de disco, especialmente aquelas que não exigem segurança.