Index: benchmark.tcl
==================================================================
--- benchmark.tcl
+++ benchmark.tcl
@@ -2,35 +2,74 @@
 
 set LIB_SUFFIX [info sharedlibextension]
 load -global ./xvfs${LIB_SUFFIX}; # Optional, uses a dispatcher
 load ./example-flexible${LIB_SUFFIX} Xvfs_example
 
-set benchmarkFormat "%-6s %-5s: %s"
+set benchmarkFormat "%-6s  %-11s  %s"
 
 proc benchmark {type name code} {
-	time $code 100
-	set time [time $code 10000]
+	set iterations 10000
+
+	set work [string trim [lindex [split [string trim $code] "\n"] 0]]
+	if {[string match "# iterations: *" $work]} {
+		set iterations [lindex $work 2]
+	}
+	
+	time $code [expr {max($iterations / 100, 1)}]
+	set time [time $code $iterations]
 
 	puts [format $::benchmarkFormat $type $name $time]
 }
 
 set rootDirMap(xvfs) "//xvfs:/example"
 set rootDirMap(native) [file join [pwd] example]
 
-set test(CD) {
-	cd $::rootDir
-	pwd
+proc recursiveGlob {dir} {
+	foreach subDir [glob -nocomplain -directory $dir -types d *] {
+		recursiveGlob $subDir
+	}
 }
 
-set test(Read) {
-	set fd [open ${::rootDir}/main.tcl]
-	read $fd
-	close $fd
-}
-
-set test(Glob) {
-	glob -directory ${::rootDir} *
+array set test {
+	CD {
+		cd $::rootDir
+		pwd
+	}
+	Read {
+		set fd [open ${::rootDir}/main.tcl]
+		read $fd
+		close $fd
+	}
+	"Read Async" {
+		# iterations: 1000
+		set ::async_read_done false
+		set fd [open ${::rootDir}/main.tcl]
+		fconfigure $fd -blocking false
+		fileevent $fd readable [list apply {{fd} {
+			set input [read $fd 512]
+			if {[eof $fd] && $input eq ""} {
+				set ::async_read_done true
+				return
+			}
+		}} $fd]
+		vwait ::async_read_done
+		close $fd
+	}
+	Glob {
+		glob -directory ${::rootDir} *
+	}
+	Search {
+		recursiveGlob ${::rootDir}
+	}
+	+Stat {
+		file stat ${::rootDir}/main.tcl UNUSED
+	}
+	-Stat {
+		catch {
+			file stat ${::rootDir}/DOES-NOT-EXIST UNUSED
+		}
+	}
 }
 
 foreach {testName testBody} [lsort -stride 2 -dictionary [array get test]] {
 	foreach rootDirType {xvfs native} {
 		set rootDir $rootDirMap($rootDirType)