diff --git a/src/bin/wfd/main.rs b/src/bin/wfd/main.rs
index 050e72a..6ddb0c4 100644
--- a/src/bin/wfd/main.rs
+++ b/src/bin/wfd/main.rs
@@ -146,16 +146,28 @@ struct TimelineGroup {
     data: Vec<TimelineLabel>,
 }
 
+#[derive(Serialize, Deserialize)]
+struct DetailedTimelineOptions {
+    #[serde(default)]
+    max_intervals: Option<usize>,
+}
+
 async fn get_detailed_timeline(
+    options: web::Query<DetailedTimelineOptions>,
     span: web::Json<Interval>,
     state: web::Data<AppState>,
 ) -> impl Responder {
     let interval = span.into_inner();
+    let max_intervals = options.into_inner().max_intervals;
 
     let (response, rx) = oneshot::channel();
     state
         .runner_tx
-        .send(RunnerMessage::GetResourceStateDetails { interval, response })
+        .send(RunnerMessage::GetResourceStateDetails {
+            interval,
+            response,
+            max_intervals,
+        })
         .unwrap();
 
     match rx.await {
@@ -201,32 +213,34 @@ async fn get_detailed_timeline(
 ///     What resources it relies on
 ///     Last attempt (if any)
 async fn get_segment_details(
+    max_intervals: web::Query<Option<usize>>,
     span: web::Json<Interval>,
     state: web::Data<AppState>,
 ) -> impl Responder {
+    /*
     let interval = span.into_inner();
 
     let (response, rx) = oneshot::channel();
     state
         .runner_tx
-        .send(RunnerMessage::GetResourceStateDetails { interval, response })
+        .send(RunnerMessage::GetResourceStateDetails {
+            interval,
+            response,
+            max_intervals: max_intervals.into_inner(),
+        })
         .unwrap();
 
     match rx.await {
         Ok(actions) => {
             let mut timeline = Vec::new();
-            info!(
-                "Querying for actions over {}, got {} responses.",
-                interval,
-                actions.len()
-            );
-
             for (resource, tasks) in actions {
                 let mut group = TimelineGroup {
                     group: resource.clone(),
                     data: Vec::new(),
                 };
-                for (task_name, intervals) in tasks.into_iter() {
+                for (task_name, mut intervals) in tasks.into_iter() {
+                    // Collapse intervals
+                    if intervals.len() > 50 {}
                     let data = intervals
                         .into_iter()
                         .map(|a| TimelineInterval {
@@ -249,6 +263,8 @@ async fn get_segment_details(
             error: format!("{:?}", error),
         }),
     }
+    */
+    HttpResponse::Ok()
 }
 
 /*
diff --git a/src/lib.rs b/src/lib.rs
index 584f7d0..575d84c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,6 @@
 #![allow(unused_imports)]
 #![allow(dead_code)]
+#![feature(slice_group_by)]
 
 use anyhow::{anyhow, Result};
 use chrono::prelude::*;
diff --git a/src/runner.rs b/src/runner.rs
index b22cdf7..0fb50e5 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -1,6 +1,7 @@
 use super::*;
 use futures::stream::futures_unordered::FuturesUnordered;
 use futures::StreamExt;
+use std::cmp::Ordering;
 use std::collections::VecDeque;
 
 /*
@@ -13,7 +14,7 @@ use std::collections::VecDeque;
         - current = TaskSet::coverage (the theoretical)
 */
 
-#[derive(Debug, Clone, Copy, PartialEq, Serialize)]
+#[derive(Debug, Clone, Copy, PartialEq, Serialize, PartialOrd)]
 pub enum ActionState {
     Queued,
     Running,
@@ -67,6 +68,7 @@ pub enum RunnerMessage {
     GetResourceStateDetails {
         interval: Interval,
         response: oneshot::Sender<ResourceStateDetails>,
+        max_intervals: Option<usize>,
     },
     Stop,
 }
@@ -237,6 +239,40 @@ fn delayed_event(delay: Duration, event: RunnerMessage) -> tokio::task::JoinHand
     })
 }
 
+// Coalesces adjascent actions
+fn coalesce_actions(mut actions: Vec<Action>) -> Vec<Action> {
+    if actions.is_empty() {
+        return actions;
+    }
+
+    actions.sort_unstable_by(|a, b| {
+        let ord = a.task.partial_cmp(&b.task).unwrap();
+        if ord == Ordering::Equal {
+            a.state.partial_cmp(&b.state).unwrap()
+        } else {
+            ord
+        }
+    });
+
+    let mut res: Vec<Action> = Vec::new();
+    for group in actions.group_by(|a, b| a.task == b.task && a.state == b.state) {
+        let intervals: Vec<Interval> = group.iter().map(|x| x.interval).collect();
+        let is = IntervalSet::from(intervals);
+        let task = group.first().unwrap().task;
+        let state = group.first().unwrap().state;
+
+        for interval in is.iter() {
+            res.push(Action {
+                task: task,
+                state: state,
+                interval: *interval,
+            })
+        }
+    }
+
+    res
+}
+
 impl Runner {
     pub async fn new(
         tasks: TaskSet,
@@ -375,6 +411,7 @@ impl Runner {
         &self,
         interval: Interval,
         response: oneshot::Sender<ResourceStateDetails>,
+        max_intervals: Option<usize>,
     ) {
         // HashMap<Resource, HashMap<String, Vec<(DateTime<Utc>, DateTime<Utc>, ActionState)>>>;
         let mut res: ResourceStateDetails = HashMap::new();
@@ -396,13 +433,19 @@ impl Runner {
             res.insert(resource.clone(), res_ints);
         }
 
-        let actions: Vec<Action> = self
+        let mut actions: Vec<Action> = self
             .actions
             .iter()
             .filter(|x| interval.is_contiguous(x.interval))
             .cloned()
             .collect();
 
+        if let Some(max_intv) = max_intervals {
+            if actions.len() > max_intv {
+                actions = coalesce_actions(actions);
+            }
+        }
+
         info!(
             "Filtered {} actions down to {}",
             self.actions.len(),
@@ -444,8 +487,12 @@ impl Runner {
                 Some(Ok(RunnerMessage::Tick)) => {
                     self.tick();
                 }
-                Some(Ok(RunnerMessage::GetResourceStateDetails { interval, response })) => {
-                    self.get_resource_state_details(interval, response);
+                Some(Ok(RunnerMessage::GetResourceStateDetails {
+                    interval,
+                    response,
+                    max_intervals,
+                })) => {
+                    self.get_resource_state_details(interval, response, max_intervals);
                 }
                 Some(Ok(RunnerMessage::ForceUp {
                     resources,
diff --git a/webui/src/App.vue b/webui/src/App.vue
index e26509c..f9a619b 100644
--- a/webui/src/App.vue
+++ b/webui/src/App.vue
@@ -9,6 +9,7 @@ export default {
       refreshSeconds: 15,  // How often to refresh
       waterfallURL: 'http://localhost:2503',
       activeSegment: null,
+      maxDisplayIntervals: 500,
     }
   },
 
@@ -19,6 +20,10 @@ export default {
     updateRefreshInterval(interval) {
       this.refreshSeconds = interval;
     },
+    updateMaxDisplayIntervals(cnt) {
+      this.maxDisplayIntervals = cnt;
+    },
+
     setActiveSegment(segment) {
       this.activeSegment = segment;
     },
@@ -41,14 +46,17 @@ input { max-width: 25%; }
     <GlobalSettings
       :waterfallURL="waterfallURL"
       :refreshSeconds="refreshSeconds"
+      :maxDisplayIntervals="maxDisplayIntervals"
       @update-refresh-interval="(interval) => this.updateRefreshInterval(interval)"
       @update-waterfall-url="(url) => this.updateURL(url)"
+      @update-max-display-intervals="(cnt) => this.updateMaxDisplayIntervals(cnt)"
       />
   <br/>
   <div>
     <Timeline
       :waterfallURL="waterfallURL"
       :refreshSeconds="refreshSeconds"
+      :maxDisplayIntervals="maxDisplayIntervals"
       @update-active-segment="(segment) => this.setActiveSegment(segment)"
     />
   </div>
diff --git a/webui/src/components/GlobalSettings.vue b/webui/src/components/GlobalSettings.vue
index 222b78c..f81a51f 100644
--- a/webui/src/components/GlobalSettings.vue
+++ b/webui/src/components/GlobalSettings.vue
@@ -1,17 +1,21 @@
 <script>
 export default {
-  props: ['refreshSeconds', 'waterfallURL'],
+  props: ['refreshSeconds', 'waterfallURL', 'maxDisplayIntervals'],
   data() {
     return {
       interval: this.refreshSeconds,
       url: this.waterfallURL,
+      max_display_intervals: this.maxDisplayIntervals,
     };
   },
-  emits: ['update-refresh-interval', 'update-waterfall-url'],
+  emits: ['update-refresh-interval', 'update-waterfall-url', 'update-max-intervals'],
   computed: {
     validRefreshIntervals() {
       return [5, 10, 15, 30, 60, 300, 600];
     },
+    validDisplayIntervals() {
+      return [0, 100, 250, 500, 1000, 1500];
+    },
     isSelected(interval) {
       return (interval === this.refreshSeconds ? 'selected' : 'unselected');
     },
@@ -37,5 +41,17 @@ export default {
         </option>
       </select>
     </label>
+    <label>
+      Max Display Intervals
+      <select @change="$emit('update-max-display-intervals', max_display_intervals)" v-model="max_display_intervals">
+        <option v-for="cnt in validDisplayIntervals"
+                :key="cnt"
+                :value="cnt"
+                >
+                {{ cnt }} Segments
+        </option>
+      </select>
+    </label>
+
   </details>
 </template>
diff --git a/webui/src/components/Timeline.vue b/webui/src/components/Timeline.vue
index a6106c5..447dec3 100644
--- a/webui/src/components/Timeline.vue
+++ b/webui/src/components/Timeline.vue
@@ -16,7 +16,7 @@ const MIN_TIME="1970-01-01T00:00:00Z";
 const MAX_TIME="2099-01-01T00:00:00Z";
 
 export default {
-  props: ['waterfallURL', 'refreshSeconds'],
+  props: ['waterfallURL', 'refreshSeconds', 'maxDisplayIntervals'],
   data() {
     return {
       chart: null,
@@ -33,11 +33,15 @@ export default {
     waterfallURL() {
       this.fetchTimeline();
     },
+    maxDisplayIntervals() {
+      this.fetchTimeline();
+    },
+
   },
 
   methods: {
     async fetchTimeline() {
-      fetch(`${this.waterfallURL}/api/v1/details`, {
+      fetch(`${this.waterfallURL}/api/v1/details?max_intervals=${this.maxDisplayIntervals}`, {
         method: 'POST',
         headers: {
           'Content-Type': 'application/json'