variable backoff

Author: ctzsnooze

src/js/tabs/onboard_logging.js

@@ -491,16 +491,14 @@ onboard_logging.initialize = function (callback) {
             show_saving_dialog();
 
             const MAX_SIMPLE_RETRIES = 5;
-            const RETRY_BACKOFF_MS = 30; // ms
+            const BASE_RETRY_BACKOFF_MS = 30; // base backoff in ms
             const startTime = new Date().getTime();
 
             prepare_file((fileWriter) => {
                 FileSystem.openFile(fileWriter).then((file) => {
                     openedFile = file;
-
                     let nextAddress = 0;
 
-                    // Queue-based read function
                     function readNextBlock() {
                         if (saveCancelled || nextAddress >= maxBytes) {
                             mark_saving_dialog_done(startTime, nextAddress, totalBytesCompressed);
@@ -516,6 +514,7 @@ onboard_logging.initialize = function (callback) {
                                 self.blockSize,
                                 (chunkAddress, chunkDataView, bytesCompressed) => {
                                     if (chunkDataView && chunkDataView.byteLength > 0) {
+                                        // Good block
                                         simpleRetryCount = 0;
 
                                         const blob = new Blob([chunkDataView]);
@@ -530,7 +529,6 @@ onboard_logging.initialize = function (callback) {
 
                                         $(".dataflash-saving progress").attr("value", (nextAddress / maxBytes) * 100);
 
-                                        // Continue with next block
                                         readNextBlock();
                                     } else if (chunkDataView && chunkDataView.byteLength === 0) {
                                         // Zero-length block → EOF
@@ -540,17 +538,20 @@ onboard_logging.initialize = function (callback) {
                                         // Null/missing block
                                         if (simpleRetryCount < MAX_SIMPLE_RETRIES) {
                                             simpleRetryCount++;
+                                            const backoff = BASE_RETRY_BACKOFF_MS * simpleRetryCount;
+
                                             if (simpleRetryCount % 2 === 1) {
                                                 console.warn(
-                                                    `Null/missing block at ${nextAddress}, retry ${simpleRetryCount}`,
+                                                    `Null/missing block at ${nextAddress}, retry ${simpleRetryCount}, backoff ${backoff}ms`,
                                                 );
                                             }
-                                            setTimeout(attemptRead, RETRY_BACKOFF_MS);
+
+                                            setTimeout(attemptRead, backoff);
                                         } else {
                                             console.error(
                                                 `Skipping null block at ${nextAddress} after ${MAX_SIMPLE_RETRIES} retries`,
                                             );
-                                            nextAddress += self.blockSize;
+                                            nextAddress += self.blockSize; // skip block
                                             readNextBlock();
                                         }
                                     }