perf(json-crdt): ⚡️ improve node size retrieval for binary encoding

Author: streamich

src/json-crdt/codec/structural/README.md

@@ -1,3 +1,4 @@
 # Structural Codecs
 
-Structural codecs encode the hierarchical structure of the document.
+Structural codecs encode the hierarchical structure of the document. Indexed
+codecs encode the document as a flat map of nodes.

src/json-crdt/codec/structural/binary/Encoder.ts

@@ -125,7 +125,7 @@ export class Encoder extends CborEncoder<CrdtWriter> {
     const ts = this.ts;
     const writer = this.writer;
     ts(node.id);
-    this.writeTL(CRDT_MAJOR_OVERLAY.ARR, node.size());
+    this.writeTL(CRDT_MAJOR_OVERLAY.ARR, node.count);
     const index = this.doc.index;
     for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
       const span = chunk.span;
@@ -142,7 +142,7 @@ export class Encoder extends CborEncoder<CrdtWriter> {
     const ts = this.ts;
     const writer = this.writer;
     ts(node.id);
-    this.writeTL(CRDT_MAJOR_OVERLAY.STR, node.size());
+    this.writeTL(CRDT_MAJOR_OVERLAY.STR, node.count);
     for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
       ts(chunk.id);
       if (chunk.del) {
@@ -156,7 +156,7 @@ export class Encoder extends CborEncoder<CrdtWriter> {
     const ts = this.ts;
     const writer = this.writer;
     ts(node.id);
-    this.writeTL(CRDT_MAJOR_OVERLAY.BIN, node.size());
+    this.writeTL(CRDT_MAJOR_OVERLAY.BIN, node.count);
     for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
       const length = chunk.span;
       const deleted = chunk.del;