$ set def [.mapfile]
$ javac *.java
$ set def [-]
$! java -cp . "mapfile.Gen" demo.txt
$! java -cp . "mapfile.Read1" demo.txt
$ java -cp . "mapfile.Read2" demo.txt
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Read one line at a time : 5748 ms
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Read one line at a time : 1514 ms
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Read one line at a time : 1457 ms
$ java -cp . "mapfile.Read3" demo.txt
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Map file to memory : 964 ms
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Map file to memory : 559 ms
VMS Software, Inc. 1.8.0_222 / OpenVMS V8.4-2L3
10000000 lines
Map file to memory : 292 ms
$ cc read2
$ link read2
$ mcr sys$disk:[]read2 demo.txt
10000000 lines
Read one line at a time : 2939 ms
10000000 lines
Read one line at a time : 2927 ms
10000000 lines
Read one line at a time : 2927 ms
$ cc read3vms
$ link read3vms
$ mcr sys$disk:[]read3vms demo.txt
10000000 lines
Map file to memory : 369 ms
10000000 lines
Map file to memory : 358 ms
10000000 lines
Map file to memory : 332 ms
$ cc read3nix
$ link read3nix
$ mcr sys$disk:[]read3nix demo.txt
10000000 lines
Map file to memory : 454 ms
10000000 lines
Map file to memory : 444 ms
10000000 lines
Map file to memory : 465 ms
$ pas Read2
$ link Read2
$ mcr sys$disk:[]Read2 demo.txt
10000000 lines
Read one line at a time : 31040 ms
10000000 lines
Read one line at a time : 31040 ms
10000000 lines
Read one line at a time : 31050 ms
$ pas Read3
$ link Read3
$ mcr sys$disk:[]Read3 demo.txt
10000000 lines
Read one line at a time : 450 ms
10000000 lines
Read one line at a time : 510 ms
10000000 lines
Read one line at a time : 520 ms
$ python read1.py demo.txt
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read all lines : 8267 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read all lines : 8368 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read all lines : 8319 ms
$ python read2.py demo.txt
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read one line at a time : 17141 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read one line at a time : 17115 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Read one line at a time : 17147 ms
$ python read3.py demo.txt
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Map file to memory : 344848 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Map file to memory : 345261 ms
3.10.0 (default, Nov 25 2021, 10:52:09) [C] / OpenVMS-V8.4-2L3-HP_Integrity_rx2800_i2___1_60GH-IA64-32bit
10000000 lines
Map file to memory : 345429 ms