Steam minimal resource usage after removal of -no-browser & -vgui options. Enter script in powershell then use Steam_min shortcut on Desktop instead

. steamwebhelper_min.bat

@(set ^ "0=%~f0" -des ') & powershell -nop -c iex(out-string -i (gc -lit $env:0)) & exit /b ');.{

" Steam_min : always starts in SmallMode with reduced ram usage when idle - AveYo, 2025.03.10 " 

$QUICK = '-silent -quicklogin -vgui -oldtraymenu -nofriendsui -no-dwrite -vrdisable -forceservice -console ' + 
         '-cef-force-browser-underlay -cef-delaypageload -cef-force-occlusion -cef-disable-gpu -cef-single-process'

$STEAM = resolve-path (gp "HKCU:\SOFTWARE\Valve\Steam" -ea 0).SteamPath
$LASTW = 20250310

$SignIntoFriends = 0

#:: AveYo: lean and mean helper functions to process steam vdf files
function vdf_read {
  param([string[]]$vdf, [ref]$line=([ref]0), [string]$r='\A\s*("(?<k>[^"]+)"|(?<b>[\{\}]))\s*(?<v>"(?:\\"|[^"])*")?\Z') #
  $obj = new-object System.Collections.Specialized.OrderedDictionary # ps 3.0: [ordered]@{}
  while ($line.Value -lt $vdf.count) {
    if ($vdf[$line.Value] -match $r) {
      if ($matches.k) { $key = $matches.k }
      if ($matches.v) { $obj.$key = $matches.v }
      elseif ($matches.b -eq '{') { $line.Value++; $obj.$key = vdf_read -vdf $vdf -line $line }
      elseif ($matches.b -eq '}') { break }
    } 
    $line.Value++
  }
  return $obj
}
function vdf_write {
  param($vdf, [ref]$indent=([ref]0))
  if ($vdf -isnot [System.Collections.Specialized.OrderedDictionary]) {return}
  foreach ($key in $vdf.Keys) {
    if ($vdf[$key] -is [System.Collections.Specialized.OrderedDictionary]) {
      $t = "`t" * $indent.Value
      write-output "$t`"$key`"`n$t{`n"
      $indent.Value++; vdf_write -vdf $vdf[$key] -indent $indent; $indent.Value--
      write-output "$t}`n"
    } else {
      $t = "`t" * $indent.Value
      write-output "$t`"$key`"`t`t$($vdf[$key])`n"
    }
  }
}
function vdf_mkdir {
  param($vdf, [string]$path=''); $s = $path.split('\',2); $key = $s[0]; $recurse = $s[1]
  if ($vdf.Keys -notcontains $key) { $vdf.$key = new-object System.Collections.Specialized.OrderedDictionary }
  if ($recurse) { vdf_mkdir $vdf[$key] $recurse }
}
function sc-nonew($fn,$txt) {
  if ((Get-Command set-content).Parameters['nonewline'] -ne $null) { set-content $fn $txt -nonewline -force }
  else { [IO.File]::WriteAllText($fn, $txt -join "`n") } # ps2.0
}

#_# AveYo: change steam startup location to Library window
dir "$STEAM\userdata\*\7\remote\sharedconfig.vdf" -Recurse |foreach {
  $file = $_; $write = $false; $vdf = vdf_read -vdf (gc $file -force)
  vdf_mkdir $vdf["SteamDefaultDialog"] 'Software\Valve\Steam'
  $key = $vdf["SteamDefaultDialog"]["Software"]["Valve"]["Steam"]
  if ($key["SteamDefaultDialog"] -ne '"#app_games"') { $key["SteamDefaultDialog"] = '"#app_games"'; $write = $true }
  if ($write) { sc-nonew $file $(vdf_write $vdf); write-output " $file " }
}

#_# AveYo: enable Small Mode and library performance options
$opt = @{LibraryDisableCommunityContent=1;LibraryLowBandwidthMode=1;LibraryLowPerfMode=1;LibraryDisplayIconInGameList=0}
dir "$STEAM\userdata\*\config\localconfig.vdf" -Recurse |foreach {
  $file = $_; $write = $false; $vdf = vdf_read -vdf (gc $file -force)
  vdf_mkdir $vdf["UserLocalConfigStore"] 'Software\Valve\Steam'
  $key = $vdf["UserLocalConfigStore"]["Software"]["Valve"]["Steam"]
  if ($key["SmallMode"] -ne '"1"') { $key["SmallMode"] = '"1"'; $write = $true }
  foreach ($o in $opt.Keys) { if ($vdf["UserLocalConfigStore"]["$o"] -ne "`"$($opt[$o])`"") {
    $vdf["UserLocalConfigStore"]["$o"] = "`"$($opt[$o])`""; $write = $true
  }}
  if ($SignIntoFriends -eq 0) {
    vdf_mkdir $vdf["UserLocalConfigStore"] 'friends'
    $key = $vdf["UserLocalConfigStore"]["friends"]
    if ($key["SignIntoFriends"] -ne '"0"') { $key["SignIntoFriends"] = '"0"'; $write = $true }
  }
  if ($write) { sc-nonew $file $(vdf_write $vdf); write-output " $file " }
}

#_# AveYo: add steam_reset.bat
if (-not (test-path "$STEAM\steam_reset.bat")) { set-content "$STEAM\steam_reset.bat" @'
@reg delete HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v Steam /f
@reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\steamwebhelper.exe" /f
@start "" "%~dp0steam.exe" -silent +quit force 
@timeout /t 5 /nobreak
@pushd "%~dp0userdata" & del /f /s /q localconfig.vdf sharedconfig.vdf
@start "" "%~dp0steam.exe" -silent
'@ -force
}

#_# AveYo: was this directly pasted into powershell? then we must save on disk
if (!$env:0 -or $env:0 -ne "$STEAM\steam_min.bat" -or $LASTW -lt 20250310) {
  $0 = @('@(set ^ "0=%~f0" -des '') & powershell -nop -c iex(out-string -i (gc -lit $env:0)) & exit /b '');.{' +  
  ($MyInvocation.MyCommand.Definition) + '};$_press_Enter_if_pasted_in_powershell') -split'\r?\n'
  set-content "$STEAM\steam_min.bat" $0 -force
} 

#_# AveYo: refresh Steam_min desktop shortcut and startup run if enabled
$short = "$([Environment]::GetFolderPath('Desktop'))\Steam_min.lnk"
$s = (new-object -ComObject WScript.Shell).CreateShortcut($short)
if (-not (test-path $short) -or $s.Arguments -notmatch 'steam_min') {
  $s.Description = "$STEAM\steam.exe"; $s.IconLocation = "$STEAM\steam.exe,0" 
  $s.TargetPath = "conhost"; $s.Arguments = "--headless `"$STEAM\steam_min.bat`""; $s.Save()
}
$start = 'HKCU:\Software\Microsoft\Windows\CurrentVersion\Run'
if (gp $start Steam -ea 0) { sp $start Steam "conhost --headless `"$STEAM\steam_min.bat`"" }

#_# AveYo: start Steam with quick launch options - now under explorer parent
ni "HKCU:\Software\Classes\.steam_min\shell\open\command" -force >''
sp "HKCU:\Software\Classes\.steam_min\shell\open\command" "(Default)" "`"$STEAM\steam.exe`" $QUICK"
if (!(test-path "$STEAM\.steam_min")) { set-content "$STEAM\.steam_min" "" }
start explorer -args "`"$STEAM\.steam_min`""
};$_press_Enter_if_pasted_in_powershell

.gitattributes

* text=auto
* eol=crlf

readme.md

v2 of the script has a new home at https://github.com/AveYo/Gaming/blob/main/steam_min.bat

Shouldn't you be defining $sharedconfig = $true and $localconfig = $true within the loops so the first time it hits a file that switches it to $false it still works?

Here's what I came up with, uses -pv and gets rid of the need for StringBuilders by streaming directly to a variables and joining resulting arrays:

dir "$STEAM\userdata\*\7\remote\sharedconfig.vdf" -pv vdf |foreach {
  $sharedconfig = $true; $t = gc $vdf |foreach {
  if ($_ -match '\s+"SteamDefaultDialog"\s+"') {
    if ($_ -match '#app_games') { $sharedconfig = $false }
    "`t`t`t`t""SteamDefaultDialog""`t`t""#app_games"""
  } else { if ($sharedconfig) { $_ } }  }
  if ($sharedconfig) { set-content $vdf ($t-join"`n") -nonew -force -ea 0; " $vdf" }
}

$re = '\s+"(LibraryLowBandwidthMode|LibraryLowPerfMode|LibraryDisableCommunityContent|LibraryDisplayIconInGameList)"\s+"'
dir "$STEAM\userdata\*\config\localconfig.vdf" -pv vdf |foreach {
  $localconfig = $true; $t = gc $vdf |foreach { if ($_ -notmatch $re) {
  if ($_ -match '\s+"SmallMode"\s+"') {
    if ($_ -match '"1"') { $localconfig = $false }
    "`t`t`t`t""SmallMode""`t`t""1""`n$_"
  } elseif ($localconfig -and $_ -match '\s+"LastPlayedTimesSyncTime"\s+"') {
    "`t`t`t`t""SmallMode""`t`t""1""`n$_"
  } elseif ($localconfig -and $_ -match '\s+"FavoriteServersLastUpdateTime"\s+"') {
    "`t""LibraryDisableCommunityContent""`t`t""1""`n`t""LibraryDisplayIconInGameList""`t`t""0""`n$_"
    "`t""LibraryLowBandwidthMode""`t`t""1""`n`t""LibraryLowPerfMode""`t`t""1""`n$_"
  } else { if ($localconfig) { $_ } }  }}
  if ($localconfig) { set-content $vdf ($t-join"`n") -nonew -force -ea 0; " $vdf" }
}

Also got rid of using sc for set-content since that alias is removed in PowerShell 7 due to conflicting with sc.exe

Oh, and I escaped the quotation marks by doubling them instead of doing `" since that makes it a bit more readable.

AveYo, you are a lifesaver! This goddamned web "helper" was devouring my network activity and memory, and this is the first fix that has actually worked. thank you very kindly.

@God-damnit-all thank you very much for your feedback!
I actually planned an update to the script, and made it to work in PS 7 just for you!
added a switch that makes it more readable, still using sb for compatibility with PS 2.0
and it's not like one has thousands of active accounts on a tape drive to matter ;)

@Derbear2112 glad to help!

I have updated the script, further changes will probably happen here:

https://github.com/AveYo/Gaming/blob/main/steam_min.bat