diff --git a/Clover/app/src/main/java/org/floens/chan/chan/ChanParser.java b/Clover/app/src/main/java/org/floens/chan/chan/ChanParser.java
index a3eb8459..5158917e 100644
--- a/Clover/app/src/main/java/org/floens/chan/chan/ChanParser.java
+++ b/Clover/app/src/main/java/org/floens/chan/chan/ChanParser.java
@@ -92,13 +92,12 @@ public class ChanParser {
             e.printStackTrace();
         }
 
-        if (!post.parsedSpans) {
-            post.parsedSpans = true;
-            parseSpans(theme, post);
-        }
+        parseSpans(theme, post);
 
         if (post.rawComment != null) {
             post.comment = parseComment(theme, post, post.rawComment);
+        } else {
+            post.comment = "";
         }
     }
 
diff --git a/Clover/app/src/main/java/org/floens/chan/core/manager/FilterEngine.java b/Clover/app/src/main/java/org/floens/chan/core/manager/FilterEngine.java
index 8735aac4..5f93f721 100644
--- a/Clover/app/src/main/java/org/floens/chan/core/manager/FilterEngine.java
+++ b/Clover/app/src/main/java/org/floens/chan/core/manager/FilterEngine.java
@@ -29,7 +29,9 @@ import org.floens.chan.utils.Logger;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;
@@ -67,6 +69,8 @@ public class FilterEngine {
         }
     }
 
+    private final Map<String, Pattern> patternCache = new HashMap<>();
+
     private final DatabaseManager databaseManager;
     private final DatabaseFilterManager databaseFilterManager;
 
@@ -133,21 +137,25 @@ public class FilterEngine {
         }
 
         if (matchRegex) {
-            Matcher matcher = null;
+            Pattern pattern = null;
             if (!forceCompile) {
-                matcher = filter.compiledMatcher;
+                synchronized (patternCache) {
+                    pattern = patternCache.get(filter.pattern);
+                }
             }
 
-            if (matcher == null) {
-                Pattern compiledPattern = compile(filter.pattern);
-                if (compiledPattern != null) {
-                    matcher = filter.compiledMatcher = compiledPattern.matcher("");
-                    Logger.d(TAG, "Resulting pattern: " + filter.compiledMatcher);
+            if (pattern == null) {
+                pattern = compile(filter.pattern);
+                if (pattern != null) {
+                    synchronized (patternCache) {
+                        patternCache.put(filter.pattern, pattern);
+                    }
+                    Logger.d(TAG, "Resulting pattern: " + pattern.pattern());
                 }
             }
 
-            if (matcher != null) {
-                matcher.reset(text);
+            if (pattern != null) {
+                Matcher matcher = pattern.matcher(text);
                 try {
                     return matcher.find();
                 } catch (IllegalArgumentException e) {
diff --git a/Clover/app/src/main/java/org/floens/chan/core/model/Filter.java b/Clover/app/src/main/java/org/floens/chan/core/model/Filter.java
index 420375a6..43360be8 100644
--- a/Clover/app/src/main/java/org/floens/chan/core/model/Filter.java
+++ b/Clover/app/src/main/java/org/floens/chan/core/model/Filter.java
@@ -22,8 +22,6 @@ import com.j256.ormlite.table.DatabaseTable;
 
 import org.floens.chan.core.manager.FilterType;
 
-import java.util.regex.Matcher;
-
 @DatabaseTable
 public class Filter {
     @DatabaseField(generatedId = true)
@@ -51,11 +49,6 @@ public class Filter {
     @DatabaseField(canBeNull = false)
     public int color;
 
-    /**
-     * Cached version of {@link #pattern} compiled by {@link org.floens.chan.core.manager.FilterEngine#compile(String)}.
-     */
-    public Matcher compiledMatcher;
-
     public boolean hasFilter(FilterType filterType) {
         return (type & filterType.flag) != 0;
     }
diff --git a/Clover/app/src/main/java/org/floens/chan/core/model/Post.java b/Clover/app/src/main/java/org/floens/chan/core/model/Post.java
index 73e41605..76a0a483 100644
--- a/Clover/app/src/main/java/org/floens/chan/core/model/Post.java
+++ b/Clover/app/src/main/java/org/floens/chan/core/model/Post.java
@@ -110,8 +110,6 @@ public class Post {
 
     public final ArrayList<PostLinkable> linkables = new ArrayList<>();
 
-    public boolean parsedSpans = false;
-
     public SpannableString subjectSpan;
 
     public SpannableString nameSpan;
@@ -149,16 +147,15 @@ public class Post {
      * @return false if this data is invalid
      */
     public boolean finish() {
-        if (board == null)
-            return false;
-
-        if (no < 0 || resto < 0 || date == null || time < 0)
+        if (board == null || no < 0 || resto < 0 || date == null || time < 0) {
             return false;
+        }
 
         isOP = resto == 0;
 
-        if (isOP && (replies < 0 || images < 0))
+        if (isOP && (replies < 0 || images < 0)) {
             return false;
+        }
 
         if (filename != null && ext != null && imageWidth > 0 && imageHeight > 0 && tim >= 0) {
             hasImage = true;
diff --git a/Clover/app/src/main/java/org/floens/chan/core/net/ChanReaderRequest.java b/Clover/app/src/main/java/org/floens/chan/core/net/ChanReaderRequest.java
index 9027d9b9..860ceab1 100644
--- a/Clover/app/src/main/java/org/floens/chan/core/net/ChanReaderRequest.java
+++ b/Clover/app/src/main/java/org/floens/chan/core/net/ChanReaderRequest.java
@@ -25,29 +25,50 @@ import com.android.volley.Response.Listener;
 import org.floens.chan.Chan;
 import org.floens.chan.chan.ChanUrls;
 import org.floens.chan.core.database.DatabaseManager;
+import org.floens.chan.core.database.DatabaseSavedReplyManager;
 import org.floens.chan.core.manager.FilterEngine;
 import org.floens.chan.core.model.Filter;
 import org.floens.chan.core.model.Loadable;
 import org.floens.chan.core.model.Post;
-import org.floens.chan.utils.Logger;
+import org.floens.chan.utils.Time;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
 
 public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanReaderResponse> {
     private static final String TAG = "ChanReaderRequest";
+    private static final boolean LOG_TIMING = false;
+
+    private static final int THREAD_COUNT;
+    private static ExecutorService EXECUTOR;
+
+    static {
+        THREAD_COUNT = Runtime.getRuntime().availableProcessors();
+        EXECUTOR = Executors.newFixedThreadPool(THREAD_COUNT);
+    }
 
     private Loadable loadable;
     private List<Post> cached;
     private Post op;
     private FilterEngine filterEngine;
     private DatabaseManager databaseManager;
+    private DatabaseSavedReplyManager databaseSavedReplyManager;
+
     private List<Filter> filters;
+    private long startLoad;
 
     private ChanReaderRequest(String url, Listener<ChanReaderResponse> listener, ErrorListener errorListener) {
         super(url, listener, errorListener);
         filterEngine = FilterEngine.getInstance();
         databaseManager = Chan.getDatabaseManager();
+        databaseSavedReplyManager = databaseManager.getDatabaseSavedReplyManager();
     }
 
     public static ChanReaderRequest newInstance(Loadable loadable, List<Post> cached, Listener<ChanReaderResponse> listener, ErrorListener errorListener) {
@@ -87,6 +108,8 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
             }
         }
 
+        request.startLoad = Time.startTiming();
+
         return request;
     }
 
@@ -97,84 +120,172 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
 
     @Override
     public ChanReaderResponse readJson(JsonReader reader) throws Exception {
-        List<Post> list;
+        if (LOG_TIMING) {
+            Time.endTiming("Network", startLoad);
+        }
+
+        long load = Time.startTiming();
+
+        ProcessingQueue processing = new ProcessingQueue();
+
+        Map<Integer, Post> cachedByNo = new HashMap<>();
+        for (int i = 0; i < cached.size(); i++) {
+            Post cache = cached.get(i);
+            cachedByNo.put(cache.no, cache);
+        }
 
         if (loadable.isThreadMode()) {
-            list = loadThread(reader);
+            loadThread(reader, processing, cachedByNo);
         } else if (loadable.isCatalogMode()) {
-            list = loadCatalog(reader);
+            loadCatalog(reader, processing, cachedByNo);
         } else {
             throw new IllegalArgumentException("Unknown mode");
         }
 
+        if (LOG_TIMING) {
+            Time.endTiming("Load json", load);
+        }
+
+        List<Post> list = parsePosts(processing);
         return processPosts(list);
     }
 
-    private ChanReaderResponse processPosts(List<Post> serverList) throws Exception {
+    // Concurrently parses the new posts with an executor
+    private List<Post> parsePosts(ProcessingQueue queue) throws InterruptedException, ExecutionException {
+        long parsePosts = Time.startTiming();
+
+        List<Post> total = new ArrayList<>();
+
+        total.addAll(queue.cached);
+
+        List<Callable<Post>> tasks = new ArrayList<>(queue.toParse.size());
+        for (int i = 0; i < queue.toParse.size(); i++) {
+            Post post = queue.toParse.get(i);
+            tasks.add(new PostParseCallable(filterEngine, filters, databaseSavedReplyManager, post));
+        }
+
+        if (!tasks.isEmpty()) {
+            List<Future<Post>> futures = EXECUTOR.invokeAll(tasks);
+            for (int i = 0; i < futures.size(); i++) {
+                Future<Post> future = futures.get(i);
+                Post parsedPost = future.get();
+                if (parsedPost != null) {
+                    total.add(parsedPost);
+                }
+            }
+
+            if (LOG_TIMING) {
+                Time.endTiming("Parse posts with " + THREAD_COUNT + " threads", parsePosts);
+            }
+        }
+
+        return total;
+    }
+
+    private ChanReaderResponse processPosts(List<Post> serverPosts) throws Exception {
         ChanReaderResponse response = new ChanReaderResponse();
-        response.posts = new ArrayList<>(serverList.size());
+        response.posts = new ArrayList<>(serverPosts.size());
         response.op = op;
 
+        List<Post> cachedPosts = new ArrayList<>();
+        List<Post> newPosts = new ArrayList<>();
         if (cached.size() > 0) {
+            long deleteCheck = Time.startTiming();
             // Add all posts that were parsed before
-            response.posts.addAll(cached);
+            cachedPosts.addAll(cached);
+
+            Map<Integer, Post> cachedPostsByNo = new HashMap<>();
+            for (int i = 0; i < cachedPosts.size(); i++) {
+                Post post = cachedPosts.get(i);
+                cachedPostsByNo.put(post.no, post);
+            }
+
+            Map<Integer, Post> serverPostsByNo = new HashMap<>();
+            for (int i = 0; i < serverPosts.size(); i++) {
+                Post post = serverPosts.get(i);
+                serverPostsByNo.put(post.no, post);
+            }
 
             // If there's a cached post but it's not in the list received from the server, mark it as deleted
             if (loadable.isThreadMode()) {
-                boolean serverHas;
-                for (Post cache : cached) {
-                    serverHas = false;
-                    for (Post b : serverList) {
-                        if (b.no == cache.no) {
-                            serverHas = true;
-                            break;
-                        }
-                    }
-
-                    cache.deleted.set(!serverHas);
+                for (int i = 0; i < cachedPosts.size(); i++) {
+                    Post cachedPost = cachedPosts.get(i);
+                    cachedPost.deleted.set(!serverPostsByNo.containsKey(cachedPost.no));
                 }
             }
+            if (LOG_TIMING) {
+                Time.endTiming("Delete check", deleteCheck);
+            }
+            long newCheck = Time.startTiming();
 
             // If there's a post in the list from the server, that's not in the cached list, add it.
-            boolean known;
-            for (Post post : serverList) {
-                known = false;
-
-                for (Post cache : cached) {
-                    if (cache.no == post.no) {
-                        known = true;
-                        break;
-                    }
-                }
-
-                if (!known) {
-                    response.posts.add(post);
+            for (int i = 0; i < serverPosts.size(); i++) {
+                Post serverPost = serverPosts.get(i);
+                if (!cachedPostsByNo.containsKey(serverPost.no)) {
+                    newPosts.add(serverPost);
                 }
             }
+            if (LOG_TIMING) {
+                Time.endTiming("New check", newCheck);
+            }
         } else {
-            response.posts.addAll(serverList);
+            newPosts.addAll(serverPosts);
         }
 
-        for (int i = 0; i < response.posts.size(); i++) {
-            Post sourcePost = response.posts.get(i);
-            synchronized (sourcePost.repliesFrom) {
-                sourcePost.repliesFrom.clear();
+        List<Post> allPosts = new ArrayList<>(cachedPosts.size() + newPosts.size());
+        allPosts.addAll(cachedPosts);
+        allPosts.addAll(newPosts);
+
+        if (loadable.isThreadMode()) {
+            Map<Integer, Post> postsByNo = new HashMap<>();
+            for (int i = 0; i < allPosts.size(); i++) {
+                Post post = allPosts.get(i);
+                postsByNo.put(post.no, post);
+            }
+
+            // Maps post no's to a list of no's that that post received replies from
+            Map<Integer, List<Integer>> replies = new HashMap<>();
 
-                for (int j = i + 1; j < response.posts.size(); j++) {
-                    Post replyToSource = response.posts.get(j);
-                    if (replyToSource.repliesTo.contains(sourcePost.no)) {
-                        sourcePost.repliesFrom.add(replyToSource.no);
+            long collectReplies = Time.startTiming();
+            for (int i = 0; i < allPosts.size(); i++) {
+                Post sourcePost = allPosts.get(i);
+
+                for (int replyTo : sourcePost.repliesTo) {
+                    List<Integer> value = replies.get(replyTo);
+                    if (value == null) {
+                        value = new ArrayList<>(3);
+                        replies.put(replyTo, value);
                     }
+                    value.add(sourcePost.no);
                 }
             }
+            if (LOG_TIMING) {
+                Time.endTiming("Collect replies", collectReplies);
+            }
+            long mapReplies = Time.startTiming();
+
+            for (Map.Entry<Integer, List<Integer>> entry : replies.entrySet()) {
+                int key = entry.getKey();
+                List<Integer> value = entry.getValue();
+
+                Post subject = postsByNo.get(key);
+                synchronized (subject.repliesFrom) {
+                    subject.repliesFrom.clear();
+                    subject.repliesFrom.addAll(value);
+                }
+            }
+
+            if (LOG_TIMING) {
+                Time.endTiming("Map replies", mapReplies);
+            }
         }
 
+        response.posts.addAll(allPosts);
+
         return response;
     }
 
-    private List<Post> loadThread(JsonReader reader) throws Exception {
-        ArrayList<Post> list = new ArrayList<>();
-
+    private void loadThread(JsonReader reader, ProcessingQueue queue, Map<Integer, Post> cachedByNo) throws Exception {
         reader.beginObject();
         // Page object
         while (reader.hasNext()) {
@@ -184,10 +295,7 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
                 // Thread array
                 while (reader.hasNext()) {
                     // Thread object
-                    Post post = readPostObject(reader);
-                    if (post != null) {
-                        list.add(post);
-                    }
+                    readPostObject(reader, queue, cachedByNo);
                 }
                 reader.endArray();
             } else {
@@ -195,13 +303,9 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
             }
         }
         reader.endObject();
-
-        return list;
     }
 
-    private List<Post> loadCatalog(JsonReader reader) throws Exception {
-        ArrayList<Post> list = new ArrayList<>();
-
+    private void loadCatalog(JsonReader reader, ProcessingQueue queue, Map<Integer, Post> cachedByNo) throws Exception {
         reader.beginArray(); // Array of pages
 
         while (reader.hasNext()) {
@@ -212,10 +316,7 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
                     reader.beginArray(); // Threads array
 
                     while (reader.hasNext()) {
-                        Post post = readPostObject(reader);
-                        if (post != null) {
-                            list.add(post);
-                        }
+                        readPostObject(reader, queue, cachedByNo);
                     }
 
                     reader.endArray();
@@ -228,11 +329,9 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
         }
 
         reader.endArray();
-
-        return list;
     }
 
-    private Post readPostObject(JsonReader reader) throws Exception {
+    private void readPostObject(JsonReader reader, ProcessingQueue queue, Map<Integer, Post> cachedByNo) throws Exception {
         Post post = new Post();
         post.board = loadable.board;
 
@@ -242,12 +341,7 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
 
             switch (key) {
                 case "no":
-                    // Post number
                     post.no = reader.nextInt();
-                /*} else if (key.equals("time")) {
-                    // Time
-                    long time = reader.nextLong();
-                    post.date = new Date(time * 1000);*/
                     break;
                 case "now":
                     post.date = reader.nextString();
@@ -340,59 +434,23 @@ public class ChanReaderRequest extends JsonReaderRequest<ChanReaderRequest.ChanR
             op.uniqueIps = post.uniqueIps;
         }
 
-        Post cached = null;
-        for (Post item : this.cached) {
-            if (item.no == post.no) {
-                cached = item;
-
-                break;
-            }
-        }
-
+        Post cached = cachedByNo.get(post.no);
         if (cached != null) {
-            return cached;
+            queue.cached.add(cached);
         } else {
-            // Process the filters before finish, because parsing the html is dependent on filter matches
-            processPostFilter(post);
-            if (!post.finish()) {
-                Logger.e(TAG, "Incorrect data about post received for post " + post.no);
-                return null;
-            } else {
-                processPostAfterFinish(post);
-                return post;
-            }
-        }
-    }
-
-    private void processPostFilter(Post post) {
-        int filterSize = filters.size();
-        for (int i = 0; i < filterSize; i++) {
-            Filter filter = filters.get(i);
-            if (filterEngine.matches(filter, post)) {
-                FilterEngine.FilterAction action = FilterEngine.FilterAction.forId(filter.action);
-                switch (action) {
-                    case COLOR:
-                        post.filterHighlightedColor = filter.color;
-                        break;
-                    case HIDE:
-                        post.filterStub = true;
-                        break;
-                    case REMOVE:
-                        post.filterRemove = true;
-                        break;
-                }
-            }
+            queue.toParse.add(post);
         }
     }
 
-    private void processPostAfterFinish(Post post) {
-        post.isSavedReply = databaseManager.getDatabaseSavedReplyManager().isSaved(post.board, post.no);
-    }
-
     public static class ChanReaderResponse {
         // Op Post that is created new each time.
         // Used to later copy members like image count to the real op on the main thread.
         public Post op;
         public List<Post> posts;
     }
+
+    private static class ProcessingQueue {
+        public List<Post> cached = new ArrayList<>();
+        public List<Post> toParse = new ArrayList<>();
+    }
 }
diff --git a/Clover/app/src/main/java/org/floens/chan/core/net/JsonReaderRequest.java b/Clover/app/src/main/java/org/floens/chan/core/net/JsonReaderRequest.java
index f32e1032..9da1f632 100644
--- a/Clover/app/src/main/java/org/floens/chan/core/net/JsonReaderRequest.java
+++ b/Clover/app/src/main/java/org/floens/chan/core/net/JsonReaderRequest.java
@@ -31,9 +31,11 @@ import org.floens.chan.utils.IOUtils;
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStreamReader;
-import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
 
 public abstract class JsonReaderRequest<T> extends Request<T> {
+    private static final Charset UTF8 = Charset.forName("UTF-8");
+
     protected final Listener<T> listener;
 
     public JsonReaderRequest(String url, Listener<T> listener, ErrorListener errorListener) {
@@ -50,19 +52,14 @@ public abstract class JsonReaderRequest<T> extends Request<T> {
     @Override
     protected Response<T> parseNetworkResponse(NetworkResponse response) {
         ByteArrayInputStream baos = new ByteArrayInputStream(response.data);
-
-        JsonReader reader = null;
-        try {
-            reader = new JsonReader(new InputStreamReader(baos, "UTF-8"));
-        } catch (UnsupportedEncodingException e) {
-            e.printStackTrace();
-        }
+        JsonReader reader = new JsonReader(new InputStreamReader(baos, UTF8));
 
         Exception exception = null;
         T read = null;
         try {
             read = readJson(reader);
         } catch (Exception e) {
+
             exception = e;
         }
 
diff --git a/Clover/app/src/main/java/org/floens/chan/core/net/PostParseCallable.java b/Clover/app/src/main/java/org/floens/chan/core/net/PostParseCallable.java
new file mode 100644
index 00000000..5a6d8f43
--- /dev/null
+++ b/Clover/app/src/main/java/org/floens/chan/core/net/PostParseCallable.java
@@ -0,0 +1,81 @@
+/*
+ * Clover - 4chan browser https://github.com/Floens/Clover/
+ * Copyright (C) 2014  Floens
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.floens.chan.core.net;
+
+import org.floens.chan.core.database.DatabaseSavedReplyManager;
+import org.floens.chan.core.manager.FilterEngine;
+import org.floens.chan.core.model.Filter;
+import org.floens.chan.core.model.Post;
+import org.floens.chan.utils.Logger;
+
+import java.util.List;
+import java.util.concurrent.Callable;
+
+// Called concurrently to parse the post html and the filters on it
+class PostParseCallable implements Callable<Post> {
+    private static final String TAG = "PostParseCallable";
+
+    private FilterEngine filterEngine;
+    private List<Filter> filters;
+    private DatabaseSavedReplyManager savedReplyManager;
+    private Post post;
+
+    public PostParseCallable(FilterEngine filterEngine, List<Filter> filters,
+                             DatabaseSavedReplyManager savedReplyManager, Post post) {
+        this.filterEngine = filterEngine;
+        this.filters = filters;
+        this.savedReplyManager = savedReplyManager;
+        this.post = post;
+    }
+
+    @Override
+    public Post call() throws Exception {
+        // Process the filters before finish, because parsing the html is dependent on filter matches
+        processPostFilter(post);
+
+        if (!post.finish()) {
+            Logger.e(TAG, "Incorrect data about post received for post " + post.no);
+            return null;
+        }
+
+        post.isSavedReply = savedReplyManager.isSaved(post.board, post.no);
+
+        return post;
+    }
+
+    private void processPostFilter(Post post) {
+        int filterSize = filters.size();
+        for (int i = 0; i < filterSize; i++) {
+            Filter filter = filters.get(i);
+            if (filterEngine.matches(filter, post)) {
+                FilterEngine.FilterAction action = FilterEngine.FilterAction.forId(filter.action);
+                switch (action) {
+                    case COLOR:
+                        post.filterHighlightedColor = filter.color;
+                        break;
+                    case HIDE:
+                        post.filterStub = true;
+                        break;
+                    case REMOVE:
+                        post.filterRemove = true;
+                        break;
+                }
+            }
+        }
+    }
+}