Add test containers and Windows benchmark script for mount performance

Tests/bench.bat

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+@echo off
+
+setlocal
+
+call :freedrive mydriveletter && goto :cont
+echo ERROR: No free drive letter found.
+goto :exit
+:cont
+
+echo Using drive letter %mydriveletter%: for our tests
+echo.
+
+rem Get start time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Mount SHA-512 container
+"c:\Program Files\VeraCrypt\veracrypt.exe" /volume test.sha512.hc /hash sha512 /l %mydriveletter% /password test /q /silent /m ro
+
+rem Get end time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Get elapsed time:
+set /A elapsed=end-start
+
+rem Show elapsed time:
+set /A hh=elapsed/(60*60*100), rest=elapsed%%(60*60*100), mm=rest/(60*100), rest%%=60*100, ss=rest/100, cc=rest%%100
+if %hh% lss 10 set hh=0%hh%
+if %mm% lss 10 set mm=0%mm%
+if %ss% lss 10 set ss=0%ss%
+if %cc% lss 10 set cc=0%cc%
+echo SHA-512 = %hh%:%mm%:%ss%,%cc%
+
+"c:\Program Files\VeraCrypt\veracrypt.exe" /dismount %mydriveletter% /silent /q
+
+rem Get start time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Mount Whirlpool container.
+"c:\Program Files\VeraCrypt\veracrypt.exe" /volume test.whirlpool.hc /hash whirlpool /l %mydriveletter% /password test /q /silent /m ro
+
+rem Get end time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Get elapsed time:
+set /A elapsed=end-start
+
+rem Show elapsed time:
+set /A hh=elapsed/(60*60*100), rest=elapsed%%(60*60*100), mm=rest/(60*100), rest%%=60*100, ss=rest/100, cc=rest%%100
+if %hh% lss 10 set hh=0%hh%
+if %mm% lss 10 set mm=0%mm%
+if %ss% lss 10 set ss=0%ss%
+if %cc% lss 10 set cc=0%cc%
+echo Whirlpool = %hh%:%mm%:%ss%,%cc%
+
+"c:\Program Files\VeraCrypt\veracrypt.exe" /dismount %mydriveletter% /silent /q
+
+rem Get start time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Mount SHA-256 container
+"c:\Program Files\VeraCrypt\veracrypt.exe" /volume test.sha256.hc /hash sha256 /l %mydriveletter% /password test /q /silent /m ro
+
+rem Get end time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Get elapsed time:
+set /A elapsed=end-start
+
+rem Show elapsed time:
+set /A hh=elapsed/(60*60*100), rest=elapsed%%(60*60*100), mm=rest/(60*100), rest%%=60*100, ss=rest/100, cc=rest%%100
+if %hh% lss 10 set hh=0%hh%
+if %mm% lss 10 set mm=0%mm%
+if %ss% lss 10 set ss=0%ss%
+if %cc% lss 10 set cc=0%cc%
+echo SHA-256 = %hh%:%mm%:%ss%,%cc%
+
+"c:\Program Files\VeraCrypt\veracrypt.exe" /dismount %mydriveletter% /silent /q
+
+rem Get start time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "start=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Mount RIPEMD-160 container
+"c:\Program Files\VeraCrypt\veracrypt.exe" /volume test.ripemd160.hc /hash ripemd160 /l %mydriveletter% /password test /q /silent /m ro
+
+rem Get end time:
+for /F "tokens=1-4 delims=:.," %%a in ("%time%") do (
+   set /A "end=(((%%a*60)+1%%b %% 100)*60+1%%c %% 100)*100+1%%d %% 100"
+)
+
+rem Get elapsed time:
+set /A elapsed=end-start
+
+rem Show elapsed time:
+set /A hh=elapsed/(60*60*100), rest=elapsed%%(60*60*100), mm=rest/(60*100), rest%%=60*100, ss=rest/100, cc=rest%%100
+if %hh% lss 10 set hh=0%hh%
+if %mm% lss 10 set mm=0%mm%
+if %ss% lss 10 set ss=0%ss%
+if %cc% lss 10 set cc=0%cc%
+echo RIPEMD-160 = %hh%:%mm%:%ss%,%cc%
+
+"c:\Program Files\VeraCrypt\veracrypt.exe" /dismount %mydriveletter% /silent /q
+
+goto :exit
+
+rem Finds a free drive letter.
+rem
+rem Parameters:
+rem     %1 = Output variable name.
+rem
+rem Example:
+rem     call :freedrive mydriveletter && goto :cont
+rem     echo ERROR: No free drive letter found.
+rem     goto :EOF
+rem     :cont
+rem     echo Found drive letter: %mydriveletter%
+:freedrive
+setlocal EnableDelayedExpansion
+set exitcode=0
+set "output_var=%~1"
+for %%i in (C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z) do (
+    set "drive=%%i:"
+    rem If 'subst' fails, the drive letter is already in use.
+    rem This way we can even detect optical drives that have a drive
+    rem letter but no media in them, a case that goes undetected when
+    rem using 'if exist'.
+    subst !drive! %SystemDrive%\ >nul
+    if !errorlevel! == 0 (
+        subst !drive! /d >nul
+		set "drive=%%i"
+        goto :freedrive0
+    )
+)
+set exitcode=1
+set drive=
+:freedrive0
+endlocal & set "%output_var%=%drive%" & exit /b %exitcode%
+
+:exit