Decrease Volley startup time:

Set a max to the files
Use bufferedinput/outputstream for reading/writing files.

Clover/app/src/main/java/com/android/volley/toolbox/DiskBasedCache.java

@@ -21,6 +21,8 @@ import android.os.SystemClock;
 import com.android.volley.Cache;
 import com.android.volley.VolleyLog;
 
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
 import java.io.EOFException;
 import java.io.File;
 import java.io.FileInputStream;
@@ -63,6 +65,8 @@ public class DiskBasedCache implements Cache {
     /** Magic number for current version of cache file format. */
     private static final int CACHE_MAGIC = 0x20140623;
 
+    private static final int DEFAULT_DISK_FILES_MAX = 250;
+
     /**
      * Constructs an instance of the DiskBasedCache at the specified directory.
      * @param rootDirectory The root directory of the cache.
@@ -112,7 +116,7 @@ public class DiskBasedCache implements Cache {
         File file = getFileForKey(key);
         CountingInputStream cis = null;
         try {
-            cis = new CountingInputStream(new FileInputStream(file));
+            cis = new CountingInputStream(new BufferedInputStream(new FileInputStream(file)));
             CacheHeader.readHeader(cis); // eat header
             byte[] data = streamToBytes(cis, (int) (file.length() - cis.bytesRead));
             return entry.toCacheEntry(data);
@@ -149,9 +153,9 @@ public class DiskBasedCache implements Cache {
             return;
         }
         for (File file : files) {
-            FileInputStream fis = null;
+            BufferedInputStream fis = null;
             try {
-                fis = new FileInputStream(file);
+                fis = new BufferedInputStream(new FileInputStream(file));
                 CacheHeader entry = CacheHeader.readHeader(fis);
                 entry.size = file.length();
                 putEntry(entry.key, entry);
@@ -195,7 +199,7 @@ public class DiskBasedCache implements Cache {
         pruneIfNeeded(entry.data.length);
         File file = getFileForKey(key);
         try {
-            FileOutputStream fos = new FileOutputStream(file);
+            BufferedOutputStream fos = new BufferedOutputStream(new FileOutputStream(file));
             CacheHeader e = new CacheHeader(key, entry);
             boolean success = e.writeHeader(fos);
             if (!success) {
@@ -252,7 +256,7 @@ public class DiskBasedCache implements Cache {
      * @param neededSpace The amount of bytes we are trying to fit into the cache.
      */
     private void pruneIfNeeded(int neededSpace) {
-        if ((mTotalSize + neededSpace) < mMaxCacheSizeInBytes) {
+        if (mEntries.size() <= DEFAULT_DISK_FILES_MAX && (mTotalSize + neededSpace) < mMaxCacheSizeInBytes) {
             return;
         }
         if (VolleyLog.DEBUG) {
@@ -277,7 +281,7 @@ public class DiskBasedCache implements Cache {
             iterator.remove();
             prunedFiles++;
 
-            if ((mTotalSize + neededSpace) < mMaxCacheSizeInBytes * HYSTERESIS_FACTOR) {
+            if (mEntries.size() < DEFAULT_DISK_FILES_MAX * HYSTERESIS_FACTOR && (mTotalSize + neededSpace) < mMaxCacheSizeInBytes * HYSTERESIS_FACTOR) {
                 break;
             }
         }

Clover/app/src/main/java/org/floens/chan/ChanApplication.java

@@ -47,7 +47,7 @@ public class ChanApplication extends Application {
     private static final long FILE_CACHE_DISK_SIZE = 50 * 1024 * 1024; // 50mb
     private static final String FILE_CACHE_NAME = "filecache";
     private static final int VOLLEY_LRU_CACHE_SIZE = 8 * 1024 * 1024; // 8mb
-    private static final int VOLLEY_CACHE_SIZE = 20 * 1024 * 1024; // 8mb
+    private static final int VOLLEY_CACHE_SIZE = 10 * 1024 * 1024; // 8mb
 
     private static ChanApplication instance;
     private static RequestQueue volleyRequestQueue;