diff --git a/backend/windmill-queue/src/jobs.rs b/backend/windmill-queue/src/jobs.rs
index f90a0097e0..36f0b5c872 100644
--- a/backend/windmill-queue/src/jobs.rs
+++ b/backend/windmill-queue/src/jobs.rs
@@ -132,7 +132,7 @@ pub async fn cancel_job<'c: 'async_recursion>(
             &job_running,
             format!("canceled by {username}: (force cancel: {force_cancel})"),
             job_running.mem_peak.unwrap_or(0),
-            &e,
+            e,
             None,
             rsmq.clone(),
         )
@@ -178,28 +178,26 @@ pub async fn cancel_job<'c: 'async_recursion>(
     Ok((tx, Some(id)))
 }
 
-#[derive(Serialize)]
-pub struct WrappedError<T: Serialize> {
-    pub error: T,
+#[derive(Serialize, Debug)]
+pub struct WrappedError {
+    pub error: serde_json::Value,
 }
 
 #[instrument(level = "trace", skip_all)]
-pub async fn add_completed_job_error<
-    T: Serialize + Send + Sync,
-    R: rsmq_async::RsmqConnection + Clone + Send,
->(
+pub async fn add_completed_job_error<R: rsmq_async::RsmqConnection + Clone + Send>(
     db: &Pool<Postgres>,
     queued_job: &QueuedJob,
     logs: String,
     mem_peak: i32,
-    e: T,
+    e: serde_json::Value,
     metrics: Option<Metrics>,
     rsmq: Option<R>,
-) -> Result<WrappedError<T>, Error> {
+) -> Result<WrappedError, Error> {
     if *METRICS_ENABLED {
         metrics.map(|m| m.worker_execution_failed.inc());
     }
     let result = WrappedError { error: e };
+    tracing::error!("FOO {:?}", serde_json::to_string(&result));
     let _ = add_completed_job(
         db,
         &queued_job,
diff --git a/backend/windmill-worker/src/worker.rs b/backend/windmill-worker/src/worker.rs
index 0d9ff22ca4..00d3c1403e 100644
--- a/backend/windmill-worker/src/worker.rs
+++ b/backend/windmill-worker/src/worker.rs
@@ -1490,7 +1490,9 @@ pub async fn process_completed_job<R: rsmq_async::RsmqConnection + Send + Sync +
             &job,
             logs.to_string(),
             mem_peak.to_owned(),
-            result,
+            serde_json::from_str(result.get()).unwrap_or_else(
+                |_| json!({"message": format!("Non serializable error: {}", result.get())}),
+            ),
             metrics.clone(),
             rsmq.clone(),
         )
@@ -1576,9 +1578,9 @@ pub async fn handle_job_error<R: rsmq_async::RsmqConnection + Send + Sync + Clon
         add_completed_job_error(
             db,
             job,
-            format!("Unexpected error during job execution:\n{err}"),
+            format!("Unexpected error during job execution:\n{err:#?}"),
             mem_peak,
-            &err,
+            err.clone(),
             metrics.clone(),
             rsmq_2,
         )
@@ -1596,7 +1598,7 @@ pub async fn handle_job_error<R: rsmq_async::RsmqConnection + Send + Sync + Clon
                 (job.id, Uuid::nil(), Some(update_job_future))
             };
 
-        let wrapped_error = WrappedError { error: json!(err) };
+        let wrapped_error = WrappedError { error: err.clone() };
         let updated_flow = update_flow_status_after_job_completion(
             db,
             client,
@@ -1626,7 +1628,7 @@ pub async fn handle_job_error<R: rsmq_async::RsmqConnection + Send + Sync + Clon
                             &parent_job,
                             format!("Unexpected error during flow job error handling:\n{err}"),
                             mem_peak,
-                            &e,
+                            e,
                             metrics.clone(),
                             rsmq,
                         )
@@ -1953,7 +1955,7 @@ async fn process_result(
                 Error::ExitStatus(i) => {
                     let res = read_result(job_dir).await.ok();
 
-                    if res.is_some() {
+                    if res.as_ref().is_some_and(|x| !x.get().is_empty()) {
                         res.unwrap()
                     } else {
                         let last_10_log_lines = logs
diff --git a/backend/windmill-worker/src/worker_flow.rs b/backend/windmill-worker/src/worker_flow.rs
index 18c9f2ad02..a6dfc7d355 100644
--- a/backend/windmill-worker/src/worker_flow.rs
+++ b/backend/windmill-worker/src/worker_flow.rs
@@ -110,7 +110,7 @@ pub async fn update_flow_status_after_job_completion<
                     &nrec.job_id_for_status,
                     w_id,
                     false,
-                    &to_raw_value(&Json(&WrappedError { error: e.to_string() })),
+                    &to_raw_value(&Json(&WrappedError { error: json!(e.to_string()) })),
                     metrics.clone(),
                     true,
                     same_worker_tx.clone(),
@@ -635,7 +635,7 @@ pub async fn update_flow_status_after_job_completion_internal<
                 &flow_job,
                 logs,
                 0,
-                &canceled_job_to_result(&flow_job),
+                canceled_job_to_result(&flow_job),
                 metrics.clone(),
                 rsmq.clone(),
             )
@@ -682,7 +682,7 @@ pub async fn update_flow_status_after_job_completion_internal<
                     &flow_job,
                     "Unexpected error during flow chaining:\n".to_string(),
                     0,
-                    &e,
+                    e,
                     metrics.clone(),
                     rsmq.clone(),
                 )
diff --git a/frontend/src/lib/components/FlowStatusViewer.svelte b/frontend/src/lib/components/FlowStatusViewer.svelte
index a7663d2b2e..b431f665a6 100644
--- a/frontend/src/lib/components/FlowStatusViewer.svelte
+++ b/frontend/src/lib/components/FlowStatusViewer.svelte
@@ -18,6 +18,7 @@
 	import { Loader2 } from 'lucide-svelte'
 	import FlowStatusWaitingForEvents from './FlowStatusWaitingForEvents.svelte'
 	import { deepEqual } from 'fast-equals'
+	import FlowTimeline from './FlowTimeline.svelte'
 
 	const dispatch = createEventDispatcher()
 
@@ -159,6 +160,7 @@
 	async function updateJobId() {
 		if (jobId !== job?.id) {
 			retry_status = {}
+			flowModuleStates = {}
 			localFlowModuleStates = {}
 			await loadJobInProgress()
 			job?.script_path && loadOwner(job.script_path)
@@ -198,6 +200,7 @@
 					type: FlowStatusModule.type.IN_PROGRESS,
 					logs: job.logs,
 					args: job.args,
+					started_at: job.started_at ? new Date(job.started_at).getTime() : undefined,
 					parent_module: mod['parent_module']
 				}
 			} else {
@@ -209,6 +212,7 @@
 					job_id: job.id,
 					parent_module: mod['parent_module'],
 					duration_ms: job['duration_ms'],
+					started_at: job.started_at ? new Date(job.started_at).getTime() : undefined,
 					iteration_total: mod.iterator?.itered?.length
 					// retries: flowState?.raw_flow
 				}
@@ -291,11 +295,15 @@
 			{#if innerModules.length > 0 && !isListJob}
 				<Tabs bind:selected>
 					<Tab value="graph"><span class="font-semibold text-md">Graph</span></Tab>
+					<!-- <Tab value="timeline"><span class="font-semibold">Timeline</span></Tab> -->
 					<Tab value="sequence"><span class="font-semibold">Details</span></Tab>
 				</Tabs>
 			{/if}
 		{/if}
-		<div class={selected == 'graph' ? 'hidden' : ''}>
+		{#if render && selected == 'timeline'}
+			<FlowTimeline {flowModuleStates} />
+		{/if}
+		<div class={selected != 'sequence' ? 'hidden' : ''}>
 			{#if isListJob}
 				<h3 class="text-md leading-6 font-bold text-tertiary border-b mb-4">
 					Embedded flows: ({flowJobIds?.flowJobs.length} items)
@@ -369,6 +377,9 @@
 									if (e.detail.type == 'QueuedJob') {
 										localFlowModuleStates[flowJobIds.moduleId] = {
 											type: FlowStatusModule.type.IN_PROGRESS,
+											started_at: e.detail.started_at
+												? new Date(e.detail.started_at).getTime()
+												: undefined,
 											logs: e.detail.logs,
 											job_id: e.detail.id,
 											args: e.detail.args,
@@ -376,6 +387,9 @@
 										}
 									} else {
 										localFlowModuleStates[flowJobIds.moduleId] = {
+											started_at: e.detail.started_at
+												? new Date(e.detail.started_at).getTime()
+												: undefined,
 											args: e.detail.args,
 											type: e.detail.success
 												? FlowStatusModule.type.SUCCESS
diff --git a/frontend/src/lib/components/FlowTimeline.svelte b/frontend/src/lib/components/FlowTimeline.svelte
new file mode 100644
index 0000000000..0981760eb5
--- /dev/null
+++ b/frontend/src/lib/components/FlowTimeline.svelte
@@ -0,0 +1,92 @@
+<script lang="ts">
+	import { FlowStatusModule } from '$lib/gen'
+	import { Skeleton } from './common'
+	import type { GraphModuleState } from './graph'
+
+	export let flowModuleStates: Record<string, GraphModuleState> = {}
+
+	let items = flowModuleStates ? computeItems(flowModuleStates) : undefined
+
+	$: computeItems(flowModuleStates)
+
+	let min: undefined | number = undefined
+	let max: undefined | number = undefined
+	function computeItems(flowModuleStates: Record<string, GraphModuleState>): any {
+		let nmin: undefined | number = undefined
+		let nmax: undefined | number = undefined
+
+		let isStillRunning = false
+		Object.values(flowModuleStates).forEach((v) => {
+			if (v.started_at) {
+				if (!nmin) {
+					nmin = v.started_at
+				} else {
+					nmin = Math.min(nmin, v.started_at)
+				}
+			}
+			if (v.type == FlowStatusModule.type.IN_PROGRESS) {
+				isStillRunning = true
+			}
+			if (!isStillRunning) {
+				if (v.started_at && v.duration_ms) {
+					let lmax = v.started_at + v.duration_ms
+					if (!nmax) {
+						nmax = lmax
+					} else {
+						nmax = Math.max(nmax, lmax)
+					}
+				}
+			}
+		})
+
+		let total = (isStillRunning || !nmax ? Date.now() : nmax) - (nmin ?? Date.now())
+
+		const nentries = Object.entries(flowModuleStates).map(([k, v]) => {
+			let started_at = v.started_at && nmin ? ((v.started_at - nmin) / total) * 100 : undefined
+			let len = 0
+			if (v.duration_ms) {
+				len = v.duration_ms
+			} else if (v.started_at) {
+				len = Date.now() - v.started_at
+			} else {
+				len = 0
+			}
+			if (total) {
+				len *= 100 / total
+			} else {
+				len = 0
+			}
+			return { name: k, started_at, len }
+		})
+		min = nmin
+		max = nmax
+		return nentries
+	}
+</script>
+
+{#if items}
+	<div class="border rounded-md divide-y">
+		<div class="px-2 py-2 grid grid-cols-12 w-full"
+			><div />
+			<div class="col-span-11 pt-1 px-2 flex justify-between"><div>{min}</div><div>{max}</div></div>
+		</div>
+		{#each items as item}
+			<div class="px-2 py-2 grid grid-cols-12 w-full"
+				><div>{item.name}</div>
+				<div class="col-span-11 pt-1 px-2 flex"
+					><div style="width: {item.started_at}%" class="h-4" /><div
+						style="width: {item.len}%"
+						class="h-4 bg-blue-600 border center-center text-white text-xs"
+						>{Math.ceil(item.len) ?? 0}%</div
+					></div
+				></div
+			>
+		{/each}
+	</div>
+{:else}
+	<div class="mt-4" />
+	<Skeleton layout={[[2], 1]} />
+	{#each new Array(6) as _}
+		<Skeleton layout={[[4], 0.5]} />
+	{/each}
+{/if}
diff --git a/frontend/src/lib/components/graph/model.ts b/frontend/src/lib/components/graph/model.ts
index d7f4ba9a78..244bc7c315 100644
--- a/frontend/src/lib/components/graph/model.ts
+++ b/frontend/src/lib/components/graph/model.ts
@@ -36,6 +36,7 @@ export type GraphModuleState = {
 	iteration_total?: number
 	retries?: number
 	duration_ms?: number
+	started_at?: number
 }
 
 export type NestedNodes = GraphItem[]