add some profiling on acount/transaction list storage

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / utils / Profiler.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/utils/Profiler.java b/app/src/main/java/net/ktnx/mobileledger/utils/Profiler.java
new file mode 100644 (file)
index 0000000..1545090
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/utils/Profiler.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2021 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe 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 terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.utils;
+
+import net.ktnx.mobileledger.BuildConfig;
+
+import java.util.Locale;
+
+public class Profiler {
+    private final String name;
+    private long opStart = 0;
+    private long opCount = 0;
+    private long opMills = 0;
+    public Profiler(String name) {
+        this.name = name;
+    }
+    public void opStart() {
+        if (!BuildConfig.DEBUG)
+            return;
+
+        if (opStart != 0)
+            throw new IllegalStateException("opStart() already called with no opEnd()");
+        this.opStart = System.currentTimeMillis();
+        opCount++;
+    }
+    public void opEnd() {
+        if (!BuildConfig.DEBUG)
+            return;
+
+        if (opStart == 0)
+            throw new IllegalStateException("opStart() not called");
+        opMills += System.currentTimeMillis() - opStart;
+        opStart = 0;
+    }
+    public void dumpStats() {
+        if (!BuildConfig.DEBUG)
+            return;
+
+        Logger.debug("profiler", String.format(Locale.ROOT,
+                "Operation '%s' executed %d times for %d ms. Average time %4.2fms", name, opCount,
+                opMills, 1.0 * opMills / opCount));
+    }
+}