Post computed live data ASAP

app/src/main/java/androidx/lifecycle/ComputableLiveData.java

@@ -89,6 +89,7 @@ public abstract class ComputableLiveData<T> {
         @Override
         public void run() {
             boolean computed;
+            boolean once;
             long last;
             do {
                 computed = false;
@@ -96,12 +97,14 @@ public abstract class ComputableLiveData<T> {
                 if (mComputing.compareAndSet(false, true)) {
                     // as long as it is invalid, keep computing.
                     try {
+                        once = true;
                         last = android.os.SystemClock.elapsedRealtime();
                         T value = null;
                         while (mInvalid.compareAndSet(true, false)) {
                             long now = android.os.SystemClock.elapsedRealtime();
-                            if (last + 1500 < now && value != null) {
-                                eu.faircode.email.Log.i(mLiveData + " post age=" + (now - last));
+                            if (value != null && (once || last + 2500 < now)) {
+                                eu.faircode.email.Log.i(mLiveData + " post once=" + once + " age=" + (now - last) + " ms");
+                                once = false;
                                 last = now;
                                 mLiveData.postValue(value);
                             }

patches/livedata.patch

@@ -1,11 +1,10 @@
-diff --git a/app/src/main/java/androidx/lifecycle/ComputableLiveData.java b/app/src/main/java/androidx/lifecycle/ComputableLiveData.java
-index 837a35dbf..338af5c89 100644
---- a/app/src/main/java/androidx/lifecycle/ComputableLiveData.java
-+++ b/app/src/main/java/androidx/lifecycle/ComputableLiveData.java
-@@ -89,14 +89,22 @@ public abstract class ComputableLiveData<T> {
+--- /home/marcel/support/lifecycle/lifecycle-livedata/src/main/java/androidx/lifecycle/ComputableLiveData.java	2019-07-27 12:47:44.348985792 +0200
++++ app/src/main/java/androidx/lifecycle/ComputableLiveData.java	2019-08-14 10:25:21.881453609 +0200
+@@ -89,14 +89,25 @@ public abstract class ComputableLiveData
          @Override
          public void run() {
              boolean computed;
++            boolean once;
 +            long last;
              do {
                  computed = false;
@@ -13,12 +12,14 @@ index 837a35dbf..338af5c89 100644
                  if (mComputing.compareAndSet(false, true)) {
                      // as long as it is invalid, keep computing.
                      try {
++                        once = true;
 +                        last = android.os.SystemClock.elapsedRealtime();
                          T value = null;
                          while (mInvalid.compareAndSet(true, false)) {
 +                            long now = android.os.SystemClock.elapsedRealtime();
-+                            if (last + 1500 < now && value != null) {
-+                                eu.faircode.email.Log.i(mLiveData + " post age=" + (now - last));
++                            if (value != null && (once || last + 2500 < now)) {
++                                eu.faircode.email.Log.i(mLiveData + " post once=" + once + " age=" + (now - last) + " ms");
++                                once = false;
 +                                last = now;
 +                                mLiveData.postValue(value);
 +                            }