feat: add upstream and verbose flags to command line interface

feat: add upstream support allowing to chain cache servers if needed
fix: tweaked garbage collection to be better

steamcache/gc.go

@@ -1,6 +1,7 @@
 package steamcache
 
 import (
+	"runtime/debug"
 	"s1d3sw1ped/SteamCache2/vfs"
 	"s1d3sw1ped/SteamCache2/vfs/cachestate"
 	"time"
@@ -8,9 +9,13 @@ import (
 	"golang.org/x/exp/rand"
 )
 
+func init() {
+	// Set the GC percentage to 50%. This is a good balance between performance and memory usage.
+	debug.SetGCPercent(50)
+}
+
 // RandomGC randomly deletes files until we've reclaimed enough space.
 func randomgc(vfss vfs.VFS, size uint) (uint, uint) {
-
 	// Randomly delete files until we've reclaimed enough space.
 	random := func(vfss vfs.VFS, stats []*vfs.FileInfo) int64 {
 		randfile := stats[rand.Intn(len(stats))]
@@ -29,16 +34,16 @@ func randomgc(vfss vfs.VFS, size uint) (uint, uint) {
 
 	stats := vfss.StatAll()
 	for {
-		reclaimed += random(vfss, stats)
-		deletions++
 		if reclaimed >= targetreclaim {
 			break
 		}
+		reclaimed += random(vfss, stats)
+		deletions++
 	}
 
 	return uint(reclaimed), uint(deletions)
 }
 
 func cachehandler(fi *vfs.FileInfo, cs cachestate.CacheState) bool {
-	return time.Since(fi.AccessTime()) < time.Minute*10 // Put files in the cache if they've been accessed twice in the last 10 minutes
+	return time.Since(fi.AccessTime()) < time.Second*10 // Put hot files in the fast vfs if equipped
 }