Release v0.6.35: reduce resident memory and compact shared dictionaries

src/platform.cpp

@@ -604,10 +604,25 @@ std::recursive_mutex logGate;
 bool loggingEnabled = false;
 DiagnosticBuffer diagnosticBuffer;
 }
+size_t DiagnosticBuffer::expire(ULONGLONG now)
+{
+    size_t removed = 0;
+    while (!entries.empty() && now - entries.front().first > 30000)
+    {
+        entries.pop_front();
+        ++removed;
+    }
+    return removed;
+}
+void expireDiagnostics(ULONGLONG now)
+{
+    std::lock_guard lock(logGate);
+    diagnosticBuffer.expire(now);
+}
 std::wstring DiagnosticBuffer::record(const std::wstring &message, bool problem, ULONGLONG now)
 {
-    while (!entries.empty() && (entries.size() >= 128 || now - entries.front().first > 30000))
-        entries.pop_front();
+    expire(now);
+    while (entries.size() >= 128) entries.pop_front();
     entries.emplace_back(now, message);
     if (!problem)
         return {};