Various small improvements

common/src/main/java/bisq/common/persistence/PersistenceManager.java

@@ -375,7 +375,10 @@ public void persistNow(@Nullable Runnable completeHandler) {
             // reference to the persistable object.
             getWriteToDiskExecutor().execute(() -> writeToDisk(serialized, completeHandler));
 
-            log.info("Serializing {} took {} msec", fileName, System.currentTimeMillis() - ts);
+            long duration = System.currentTimeMillis() - ts;
+            if (duration > 100) {
+                log.info("Serializing {} took {} msec", fileName, duration);
+            }
         } catch (Throwable e) {
             log.error("Error in saveToFile toProtoMessage: {}, {}", persistable.getClass().getSimpleName(), fileName);
             e.printStackTrace();
@@ -437,7 +440,10 @@ public void writeToDisk(protobuf.PersistableEnvelope serialized, @Nullable Runna
                 e.printStackTrace();
                 log.error("Cannot close resources." + e.getMessage());
             }
-            log.info("Writing the serialized {} completed in {} msec", fileName, System.currentTimeMillis() - ts);
+            long duration = System.currentTimeMillis() - ts;
+            if (duration > 100) {
+                log.info("Writing the serialized {} completed in {} msec", fileName, duration);
+            }
             persistenceRequested = false;
             if (completeHandler != null) {
                 UserThread.execute(completeHandler);

core/src/main/java/bisq/core/dao/state/model/governance/Role.java

@@ -46,6 +46,9 @@ public final class Role implements PersistablePayload, NetworkPayload, BondedAss
     private final String link;
     private final BondedRoleType bondedRoleType;
 
+    // Only used as cache
+    transient private final byte[] hash;
+
     /**
      * @param name                      Full name or nickname
      * @param link                      GitHub account or forum account of user
@@ -74,6 +77,8 @@ private Role(String uid,
         this.name = name;
         this.link = link;
         this.bondedRoleType = bondedRoleType;
+
+        hash = Hash.getSha256Ripemd160hash(toProtoMessage().toByteArray());
     }
 
     @Override
@@ -100,8 +105,7 @@ public static Role fromProto(protobuf.Role proto) {
 
     @Override
     public byte[] getHash() {
-        byte[] bytes = toProtoMessage().toByteArray();
-        return Hash.getSha256Ripemd160hash(bytes);
+        return hash;
     }
 
     @Override

core/src/main/java/bisq/core/offer/Offer.java

@@ -109,6 +109,11 @@ public enum State {
     @Setter
     transient private PriceFeedService priceFeedService;
 
+    // Used only as cache
+    @Nullable
+    @JsonExclude
+    transient private String currencyCode;
+
 
     ///////////////////////////////////////////////////////////////////////////////////////////
     // Constructor
@@ -346,8 +351,9 @@ public boolean isMyOffer(KeyRing keyRing) {
 
 
     public Optional<String> getAccountAgeWitnessHashAsHex() {
-        if (getExtraDataMap() != null && getExtraDataMap().containsKey(OfferPayload.ACCOUNT_AGE_WITNESS_HASH))
-            return Optional.of(getExtraDataMap().get(OfferPayload.ACCOUNT_AGE_WITNESS_HASH));
+        Map<String, String> extraDataMap = getExtraDataMap();
+        if (extraDataMap != null && extraDataMap.containsKey(OfferPayload.ACCOUNT_AGE_WITNESS_HASH))
+            return Optional.of(extraDataMap.get(OfferPayload.ACCOUNT_AGE_WITNESS_HASH));
         else
             return Optional.empty();
     }
@@ -421,9 +427,14 @@ public String getCountryCode() {
     }
 
     public String getCurrencyCode() {
-        return offerPayload.getBaseCurrencyCode().equals("BTC") ?
+        if (currencyCode != null) {
+            return currencyCode;
+        }
+
+        currencyCode = offerPayload.getBaseCurrencyCode().equals("BTC") ?
                 offerPayload.getCounterCurrencyCode() :
                 offerPayload.getBaseCurrencyCode();
+        return currencyCode;
     }
 
     public long getProtocolVersion() {

core/src/main/java/bisq/core/trade/statistics/TradeStatistics3.java

@@ -182,6 +182,10 @@ private enum PaymentMethodMapper {
     @Getter
     private final Map<String, String> extraDataMap;
 
+    // We cache the date object to avoid reconstructing a new Date at each getDate call.
+    @JsonExclude
+    private transient final Date dateObj;
+
     public TradeStatistics3(String currency,
                             long price,
                             long amount,
@@ -251,6 +255,8 @@ public TradeStatistics3(String currency,
         this.extraDataMap = ExtraDataMapValidator.getValidatedExtraDataMap(extraDataMap);
 
         this.hash = hash == null ? createHash() : hash;
+
+        dateObj = new Date(date);
     }
 
     public byte[] createHash() {
@@ -319,7 +325,7 @@ public Capabilities getRequiredCapabilities() {
 
     @Override
     public Date getDate() {
-        return new Date(date);
+        return dateObj;
     }
 
     public long getDateAsLong() {

p2p/src/main/java/bisq/network/p2p/storage/P2PDataStorage.java

@@ -177,7 +177,7 @@ public P2PDataStorage(NetworkNode networkNode,
         networkNode.addMessageListener(this);
         networkNode.addConnectionListener(this);
 
-        this.persistenceManager.initialize(sequenceNumberMap, PersistenceManager.Source.PRIVATE);
+        this.persistenceManager.initialize(sequenceNumberMap, PersistenceManager.Source.PRIVATE_LOW_PRIO);
     }