diff --git a/lib/upload-manager.js b/lib/upload-manager.js
index af52573..d067b77 100644
--- a/lib/upload-manager.js
+++ b/lib/upload-manager.js
@@ -941,6 +941,8 @@ class UploadManager extends EventEmitter {
             const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0 };
             this.activeJobs.set(uploadId, activeEntry);
 
+            let lastEmitTime = 0;
+            const PROGRESS_EMIT_INTERVAL = 250;
             const progressCb = (bytesUploaded, bytesTotal) => {
               const now = Date.now();
               const timeDelta = (now - lastSpeedTime) / 1000;
@@ -951,6 +953,8 @@ class UploadManager extends EventEmitter {
               }
               activeEntry.speedKbs = currentSpeedKbs;
               activeEntry.bytesUploaded = bytesUploaded;
+              if (now - lastEmitTime < PROGRESS_EMIT_INTERVAL) return;
+              lastEmitTime = now;
               const elapsed = Math.round((now - jobStart) / 1000);
               const remaining = currentSpeedKbs > 0 ? Math.round((bytesTotal - bytesUploaded) / (currentSpeedKbs * 1024)) : 0;
               this._emitProgress(uploadId, fileName, task.hoster, { accountId: task.accountId,
@@ -1072,6 +1076,8 @@ class UploadManager extends EventEmitter {
       let currentSpeedKbs = 0;
       const activeEntry = { jobId, speedKbs: 0, bytesUploaded: 0 };
       this.activeJobs.set(uploadId, activeEntry);
+      let lastEmitTime = 0;
+      const PROGRESS_EMIT_INTERVAL = 250;
       const progressCb = (bytesUploaded, bytesTotal) => {
         const now = Date.now();
         const timeDelta = (now - lastSpeedTime) / 1000;
@@ -1082,6 +1088,8 @@ class UploadManager extends EventEmitter {
         }
         activeEntry.speedKbs = currentSpeedKbs;
         activeEntry.bytesUploaded = bytesUploaded;
+        if (now - lastEmitTime < PROGRESS_EMIT_INTERVAL) return;
+        lastEmitTime = now;
         const elapsed = Math.round((now - jobStart) / 1000);
         const remaining = currentSpeedKbs > 0 ? Math.round((bytesTotal - bytesUploaded) / (currentSpeedKbs * 1024)) : 0;
         this._emitProgress(uploadId, fileName, task.hoster, { accountId: task.accountId,