memory allocator hotfix: do not allocate tremendous amounts of memory

compiler/main.nim

@@ -271,9 +271,13 @@ proc mainCommand*(graph: ModuleGraph; cache: IdentCache) =
 
   if msgs.gErrorCounter == 0 and
      gCmd notin {cmdInterpret, cmdRun, cmdDump}:
+    when declared(system.getMaxMem):
+      let usedMem = formatSize(getMaxMem()) & " peekmem"
+    else:
+      let usedMem = formatSize(getTotalMem())
     rawMessage(hintSuccessX, [$gLinesCompiled,
                formatFloat(epochTime() - gLastCmdTime, ffDecimal, 3),
-               formatSize(getTotalMem()),
+               usedMem,
                if condSyms.isDefined("release"): "Release Build"
                else: "Debug Build"])