Added a routine that will cache stuff that costs a lot of queries.

app/controllers/AccountController.php

@@ -198,13 +198,18 @@ class AccountController extends BaseController
 
         $accounts->each(
             function (Account $account) {
-                //$transaction = $account->transactions()->orderBy('updated_at', 'DESC')->first();
+                if (Cache::has('account.' . $account->id . '.lastActivityDate')) {
-                $transaction = null;
+                    \Log::debug('Cache has latest activity date for ' . $account->name . ', and it is: ' . \Cache::get('account.' . $account->id . '.lastActivityDate'));
-
+                    $account->lastActionDate = Cache::get('account.' . $account->id . '.lastActivityDate');
-                if (is_null($transaction)) {
-                    $account->lastActionDate = null;
                 } else {
-                    $account->lastActionDate = $transaction->updated_at;
+                    $transaction = $account->transactions()->orderBy('updated_at', 'DESC')->first();
+                    if (is_null($transaction)) {
+                        $account->lastActionDate = null;
+                        Cache::forever('account.' . $account->id . '.lastActivityDate', 0);
+                    } else {
+                        $account->lastActionDate = $transaction->updated_at;
+                        Cache::forever('account.' . $account->id . '.lastActivityDate', $transaction->updated_at);
+                    }
                 }
 
             }

app/controllers/TransactionController.php

@@ -106,6 +106,14 @@ class TransactionController extends BaseController
          * Trigger creation of new piggy bank event
          */
         Event::fire('transactionJournal.destroy', [$transactionJournal]); // new and used.
+        /*
+         * Since this event will also destroy both transactions, trigger on those as
+         * well because we might want to update some caches and what-not.
+         */
+        /** @var Transaction $transaction */
+        foreach ($transactionJournal->transactions as $transaction) {
+            Event::fire('transaction.destroy', [$transaction]);
+        }
 
         /** @var \FireflyIII\Database\TransactionJournal $repository */
         $repository = App::make('FireflyIII\Database\TransactionJournal');
@@ -363,6 +371,13 @@ class TransactionController extends BaseController
                     $piggyID = intval(Input::get('piggybank_id'));
                 }
                 Event::fire('transactionJournal.store', [$journal, $piggyID]); // new and used.
+                /*
+                 * Also trigger on both transactions.
+                 */
+                /** @var Transaction $transaction */
+                foreach ($journal->transactions as $transaction) {
+                    Event::fire('transaction.store', [$transaction]);
+                }
 
                 if ($data['post_submit_action'] == 'create_another') {
                     return Redirect::route('transactions.create', $what)->withInput();
@@ -406,6 +421,14 @@ class TransactionController extends BaseController
                     Session::flash('success', 'Transaction updated!');
                     Event::fire('transactionJournal.update', [$journal]); // new and used.
 
+                    /*
+                     * Also trigger on both transactions.
+                     */
+                    /** @var Transaction $transaction */
+                    foreach ($journal->transactions as $transaction) {
+                        Event::fire('transaction.update', [$transaction]);
+                    }
+
                     if (Input::get('post_submit_action') == 'return_to_edit') {
                         return Redirect::route('transactions.edit', $journal->id)->withInput();
                     } else {

app/lib/FireflyIII/Event/Transaction.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace FireflyIII\Event;
+
+
+use Illuminate\Events\Dispatcher;
+
+class Transaction
+{
+    public function destroy(\Transaction $transaction)
+    {
+        \Cache::forget('account.' . $transaction->account_id . '.latestBalance');
+        \Cache::forget('account.' . $transaction->account_id . '.lastActivityDate');
+    }
+
+    public function store(\Transaction $transaction)
+    {
+        \Cache::forget('account.' . $transaction->account_id . '.latestBalance');
+        \Cache::forget('account.' . $transaction->account_id . '.lastActivityDate');
+    }
+
+    /**
+     * @param Dispatcher $events
+     */
+    public function subscribe(Dispatcher $events)
+    {
+        // triggers when others are updated.
+        $events->listen('transaction.store', 'FireflyIII\Event\Transaction@store');
+        $events->listen('transaction.update', 'FireflyIII\Event\Transaction@update');
+        $events->listen('transaction.destroy', 'FireflyIII\Event\Transaction@destroy');
+    }
+
+    public function update(\Transaction $transaction)
+    {
+        \Cache::forget('account.' . $transaction->account_id . '.latestBalance');
+        \Cache::forget('account.' . $transaction->account_id . '.lastActivityDate');
+    }
+} 

app/lib/FireflyIII/Shared/Toolkit/Steam.php

@@ -23,13 +23,26 @@ class Steam
      */
     public function balance(\Account $account, Carbon $date = null)
     {
-        $date = is_null($date) ? Carbon::now() : $date;
+        $latest = false;
+        if (is_null($date)) {
+            $latest = true;
+            if (\Cache::has('account.' . $account->id . '.latestBalance')) {
+                \Log::debug('Cache has latest balance for ' . $account->name . ', and it is: ' . \Cache::get('account.' . $account->id . '.latestBalance'));
 
-        return floatval(
+                return \Cache::get('account.' . $account->id . '.latestBalance');
+            }
+        }
+        $date    = is_null($date) ? Carbon::now() : $date;
+        $balance = floatval(
             $account->transactions()->leftJoin(
                 'transaction_journals', 'transaction_journals.id', '=', 'transactions.transaction_journal_id'
             )->where('transaction_journals.date', '<=', $date->format('Y-m-d'))->sum('transactions.amount')
         );
+        if ($latest === true) {
+            \Cache::forever('account.' . $account->id . '.latestBalance', $balance);
+        }
+
+        return $balance;
     }
 
     /**

bootstrap/start.php

@@ -91,6 +91,7 @@ require $framework . '/Illuminate/Foundation/start.php';
 Event::subscribe('FireflyIII\Event\Piggybank');
 Event::subscribe('FireflyIII\Event\Budget');
 Event::subscribe('FireflyIII\Event\TransactionJournal');
+Event::subscribe('FireflyIII\Event\Transaction');
 
 // event that creates a relationship between transaction journals and recurring events when created.
 // event that updates the relationship between transaction journals and recurring events when edited.