diff --git a/src/common/entity/compute_state_display.ts b/src/common/entity/compute_state_display.ts
index d796a80e64..bc7e1de564 100644
--- a/src/common/entity/compute_state_display.ts
+++ b/src/common/entity/compute_state_display.ts
@@ -2,67 +2,74 @@ import { HassEntity } from "home-assistant-js-websocket";
 import { UNAVAILABLE, UNKNOWN } from "../../data/entity";
 import { FrontendLocaleData } from "../../data/translation";
 import {
-  updateIsInstalling,
-  UpdateEntity,
   UPDATE_SUPPORT_PROGRESS,
+  updateIsInstallingFromAttributes,
 } from "../../data/update";
 import { formatDate } from "../datetime/format_date";
 import { formatDateTime } from "../datetime/format_date_time";
 import { formatTime } from "../datetime/format_time";
-import { formatNumber, isNumericState } from "../number/format_number";
+import { formatNumber, isNumericFromAttributes } from "../number/format_number";
 import { LocalizeFunc } from "../translations/localize";
-import { computeStateDomain } from "./compute_state_domain";
-import { supportsFeature } from "./supports-feature";
+import { supportsFeatureFromAttributes } from "./supports-feature";
 import { formatDuration, UNIT_TO_SECOND_CONVERT } from "../datetime/duration";
+import { computeDomain } from "./compute_domain";
 
 export const computeStateDisplay = (
   localize: LocalizeFunc,
   stateObj: HassEntity,
   locale: FrontendLocaleData,
   state?: string
-): string => {
-  const compareState = state !== undefined ? state : stateObj.state;
+): string =>
+  computeStateDisplayFromEntityAttributes(
+    localize,
+    locale,
+    stateObj.entity_id,
+    stateObj.attributes,
+    state !== undefined ? state : stateObj.state
+  );
 
-  if (compareState === UNKNOWN || compareState === UNAVAILABLE) {
-    return localize(`state.default.${compareState}`);
+export const computeStateDisplayFromEntityAttributes = (
+  localize: LocalizeFunc,
+  locale: FrontendLocaleData,
+  entityId: string,
+  attributes: any,
+  state: string
+): string => {
+  if (state === UNKNOWN || state === UNAVAILABLE) {
+    return localize(`state.default.${state}`);
   }
 
   // Entities with a `unit_of_measurement` or `state_class` are numeric values and should use `formatNumber`
-  if (isNumericState(stateObj)) {
+  if (isNumericFromAttributes(attributes)) {
     // state is duration
     if (
-      stateObj.attributes.device_class === "duration" &&
-      stateObj.attributes.unit_of_measurement &&
-      UNIT_TO_SECOND_CONVERT[stateObj.attributes.unit_of_measurement]
+      attributes.device_class === "duration" &&
+      attributes.unit_of_measurement &&
+      UNIT_TO_SECOND_CONVERT[attributes.unit_of_measurement]
     ) {
       try {
-        return formatDuration(
-          compareState,
-          stateObj.attributes.unit_of_measurement
-        );
+        return formatDuration(state, attributes.unit_of_measurement);
       } catch (_err) {
         // fallback to default
       }
     }
-    if (stateObj.attributes.device_class === "monetary") {
+    if (attributes.device_class === "monetary") {
       try {
-        return formatNumber(compareState, locale, {
+        return formatNumber(state, locale, {
           style: "currency",
-          currency: stateObj.attributes.unit_of_measurement,
+          currency: attributes.unit_of_measurement,
           minimumFractionDigits: 2,
         });
       } catch (_err) {
         // fallback to default
       }
     }
-    return `${formatNumber(compareState, locale)}${
-      stateObj.attributes.unit_of_measurement
-        ? " " + stateObj.attributes.unit_of_measurement
-        : ""
+    return `${formatNumber(state, locale)}${
+      attributes.unit_of_measurement ? " " + attributes.unit_of_measurement : ""
     }`;
   }
 
-  const domain = computeStateDomain(stateObj);
+  const domain = computeDomain(entityId);
 
   if (domain === "input_datetime") {
     if (state !== undefined) {
@@ -97,36 +104,32 @@ export const computeStateDisplay = (
     } else {
       // If not trying to display an explicit state, create `Date` object from `stateObj`'s attributes then format.
       let date: Date;
-      if (stateObj.attributes.has_date && stateObj.attributes.has_time) {
+      if (attributes.has_date && attributes.has_time) {
         date = new Date(
-          stateObj.attributes.year,
-          stateObj.attributes.month - 1,
-          stateObj.attributes.day,
-          stateObj.attributes.hour,
-          stateObj.attributes.minute
+          attributes.year,
+          attributes.month - 1,
+          attributes.day,
+          attributes.hour,
+          attributes.minute
         );
         return formatDateTime(date, locale);
       }
-      if (stateObj.attributes.has_date) {
-        date = new Date(
-          stateObj.attributes.year,
-          stateObj.attributes.month - 1,
-          stateObj.attributes.day
-        );
+      if (attributes.has_date) {
+        date = new Date(attributes.year, attributes.month - 1, attributes.day);
         return formatDate(date, locale);
       }
-      if (stateObj.attributes.has_time) {
+      if (attributes.has_time) {
         date = new Date();
-        date.setHours(stateObj.attributes.hour, stateObj.attributes.minute);
+        date.setHours(attributes.hour, attributes.minute);
         return formatTime(date, locale);
       }
-      return stateObj.state;
+      return state;
     }
   }
 
   if (domain === "humidifier") {
-    if (compareState === "on" && stateObj.attributes.humidity) {
-      return `${stateObj.attributes.humidity} %`;
+    if (state === "on" && attributes.humidity) {
+      return `${attributes.humidity} %`;
     }
   }
 
@@ -136,7 +139,7 @@ export const computeStateDisplay = (
     domain === "number" ||
     domain === "input_number"
   ) {
-    return formatNumber(compareState, locale);
+    return formatNumber(state, locale);
   }
 
   // state of button is a timestamp
@@ -144,12 +147,12 @@ export const computeStateDisplay = (
     domain === "button" ||
     domain === "input_button" ||
     domain === "scene" ||
-    (domain === "sensor" && stateObj.attributes.device_class === "timestamp")
+    (domain === "sensor" && attributes.device_class === "timestamp")
   ) {
     try {
-      return formatDateTime(new Date(compareState), locale);
+      return formatDateTime(new Date(state), locale);
     } catch (_err) {
-      return compareState;
+      return state;
     }
   }
 
@@ -160,30 +163,28 @@ export const computeStateDisplay = (
     // When the latest version is skipped, show the latest version
     // When update is not available, show "Up-to-date"
     // When update is not available and there is no latest_version show "Unavailable"
-    return compareState === "on"
-      ? updateIsInstalling(stateObj as UpdateEntity)
-        ? supportsFeature(stateObj, UPDATE_SUPPORT_PROGRESS)
+    return state === "on"
+      ? updateIsInstallingFromAttributes(attributes)
+        ? supportsFeatureFromAttributes(attributes, UPDATE_SUPPORT_PROGRESS)
           ? localize("ui.card.update.installing_with_progress", {
-              progress: stateObj.attributes.in_progress,
+              progress: attributes.in_progress,
             })
           : localize("ui.card.update.installing")
-        : stateObj.attributes.latest_version
-      : stateObj.attributes.skipped_version ===
-        stateObj.attributes.latest_version
-      ? stateObj.attributes.latest_version ??
-        localize("state.default.unavailable")
+        : attributes.latest_version
+      : attributes.skipped_version === attributes.latest_version
+      ? attributes.latest_version ?? localize("state.default.unavailable")
       : localize("ui.card.update.up_to_date");
   }
 
   return (
     // Return device class translation
-    (stateObj.attributes.device_class &&
+    (attributes.device_class &&
       localize(
-        `component.${domain}.state.${stateObj.attributes.device_class}.${compareState}`
+        `component.${domain}.state.${attributes.device_class}.${state}`
       )) ||
     // Return default translation
-    localize(`component.${domain}.state._.${compareState}`) ||
+    localize(`component.${domain}.state._.${state}`) ||
     // We don't know! Return the raw state.
-    compareState
+    state
   );
 };
diff --git a/src/common/entity/compute_state_name.ts b/src/common/entity/compute_state_name.ts
index 34892ae5a1..2311830a9c 100644
--- a/src/common/entity/compute_state_name.ts
+++ b/src/common/entity/compute_state_name.ts
@@ -1,7 +1,13 @@
 import { HassEntity } from "home-assistant-js-websocket";
 import { computeObjectId } from "./compute_object_id";
 
+export const computeStateNameFromEntityAttributes = (
+  entityId: string,
+  attributes: { [key: string]: any }
+): string =>
+  attributes.friendly_name === undefined
+    ? computeObjectId(entityId).replace(/_/g, " ")
+    : attributes.friendly_name || "";
+
 export const computeStateName = (stateObj: HassEntity): string =>
-  stateObj.attributes.friendly_name === undefined
-    ? computeObjectId(stateObj.entity_id).replace(/_/g, " ")
-    : stateObj.attributes.friendly_name || "";
+  computeStateNameFromEntityAttributes(stateObj.entity_id, stateObj.attributes);
diff --git a/src/common/entity/supports-feature.ts b/src/common/entity/supports-feature.ts
index 1b1c79b518..18bf3cd891 100644
--- a/src/common/entity/supports-feature.ts
+++ b/src/common/entity/supports-feature.ts
@@ -3,6 +3,13 @@ import { HassEntity } from "home-assistant-js-websocket";
 export const supportsFeature = (
   stateObj: HassEntity,
   feature: number
+): boolean => supportsFeatureFromAttributes(stateObj.attributes, feature);
+
+export const supportsFeatureFromAttributes = (
+  attributes: {
+    [key: string]: any;
+  },
+  feature: number
 ): boolean =>
   // eslint-disable-next-line no-bitwise
-  (stateObj.attributes.supported_features! & feature) !== 0;
+  (attributes.supported_features! & feature) !== 0;
diff --git a/src/common/number/format_number.ts b/src/common/number/format_number.ts
index 7cecd1c514..9c4d9e24ce 100644
--- a/src/common/number/format_number.ts
+++ b/src/common/number/format_number.ts
@@ -7,8 +7,11 @@ import { round } from "./round";
  * @param stateObj The entity state object
  */
 export const isNumericState = (stateObj: HassEntity): boolean =>
-  !!stateObj.attributes.unit_of_measurement ||
-  !!stateObj.attributes.state_class;
+  isNumericFromAttributes(stateObj.attributes);
+
+export const isNumericFromAttributes = (attributes: {
+  [key: string]: any;
+}): boolean => !!attributes.unit_of_measurement || !!attributes.state_class;
 
 export const numberFormatToLocale = (
   localeOptions: FrontendLocaleData
diff --git a/src/data/cached-history.ts b/src/data/cached-history.ts
index a75f9fd2f0..595c30af7b 100644
--- a/src/data/cached-history.ts
+++ b/src/data/cached-history.ts
@@ -1,13 +1,13 @@
-import { HassEntity } from "home-assistant-js-websocket";
 import { LocalizeFunc } from "../common/translations/localize";
 import { HomeAssistant } from "../types";
 import {
   computeHistory,
-  fetchRecent,
+  HistoryStates,
   HistoryResult,
   LineChartUnit,
   TimelineEntity,
   entityIdHistoryNeedsAttributes,
+  fetchRecentWS,
 } from "./history";
 
 export interface CacheConfig {
@@ -55,7 +55,7 @@ export const getRecent = (
   }
 
   const noAttributes = !entityIdHistoryNeedsAttributes(hass, entityId);
-  const prom = fetchRecent(
+  const prom = fetchRecentWS(
     hass,
     entityId,
     startTime,
@@ -134,12 +134,12 @@ export const getRecentWithCache = (
   const noAttributes = !entityIdHistoryNeedsAttributes(hass, entityId);
 
   const genProm = async () => {
-    let fetchedHistory: HassEntity[][];
+    let fetchedHistory: HistoryStates;
 
     try {
       const results = await Promise.all([
         curCacheProm,
-        fetchRecent(
+        fetchRecentWS(
           hass,
           entityId,
           toFetchStartTime,
diff --git a/src/data/history.ts b/src/data/history.ts
index a631c3423a..3ac791c790 100644
--- a/src/data/history.ts
+++ b/src/data/history.ts
@@ -1,8 +1,7 @@
 import { HassEntity } from "home-assistant-js-websocket";
 import { computeDomain } from "../common/entity/compute_domain";
-import { computeStateDisplay } from "../common/entity/compute_state_display";
-import { computeStateDomain } from "../common/entity/compute_state_domain";
-import { computeStateName } from "../common/entity/compute_state_name";
+import { computeStateDisplayFromEntityAttributes } from "../common/entity/compute_state_display";
+import { computeStateNameFromEntityAttributes } from "../common/entity/compute_state_name";
 import { LocalizeFunc } from "../common/translations/localize";
 import { HomeAssistant } from "../types";
 import { FrontendLocaleData } from "./translation";
@@ -27,7 +26,7 @@ const LINE_ATTRIBUTES_TO_KEEP = [
 
 export interface LineChartState {
   state: string;
-  last_changed: string;
+  last_changed: number;
   attributes?: Record<string, any>;
 }
 
@@ -47,7 +46,7 @@ export interface LineChartUnit {
 export interface TimelineState {
   state_localize: string;
   state: string;
-  last_changed: string;
+  last_changed: number;
 }
 
 export interface TimelineEntity {
@@ -141,6 +140,21 @@ export interface StatisticsValidationResults {
   [statisticId: string]: StatisticsValidationResult[];
 }
 
+export interface HistoryStates {
+  [entityId: string]: EntityHistoryState[];
+}
+
+interface EntityHistoryState {
+  /** state */
+  s: string;
+  /** attributes */
+  a: { [key: string]: any };
+  /** last_changed; if set, also applies to lu */
+  lc: number;
+  /** last_updated */
+  lu: number;
+}
+
 export const entityIdHistoryNeedsAttributes = (
   hass: HomeAssistant,
   entityId: string
@@ -181,6 +195,27 @@ export const fetchRecent = (
   return hass.callApi("GET", url);
 };
 
+export const fetchRecentWS = (
+  hass: HomeAssistant,
+  entityId: string,
+  startTime: Date,
+  endTime: Date,
+  skipInitialState = false,
+  significantChangesOnly?: boolean,
+  minimalResponse = true,
+  noAttributes?: boolean
+) =>
+  hass.callWS<HistoryStates>({
+    type: "history/history_during_period",
+    start_time: startTime.toISOString(),
+    end_time: endTime.toISOString(),
+    significant_changes_only: significantChangesOnly || false,
+    include_start_time_state: !skipInitialState,
+    minimal_response: minimalResponse,
+    no_attributes: noAttributes || false,
+    entity_ids: [entityId],
+  });
+
 export const fetchDate = (
   hass: HomeAssistant,
   startTime: Date,
@@ -198,6 +233,27 @@ export const fetchDate = (
     }`
   );
 
+export const fetchDateWS = (
+  hass: HomeAssistant,
+  startTime: Date,
+  endTime: Date,
+  entityId?: string
+) => {
+  const params = {
+    type: "history/history_during_period",
+    start_time: startTime.toISOString(),
+    end_time: endTime.toISOString(),
+    minimal_response: true,
+    no_attributes: !!(
+      entityId && !entityIdHistoryNeedsAttributes(hass, entityId)
+    ),
+  };
+  if (entityId) {
+    return hass.callWS<HistoryStates>({ ...params, entity_ids: [entityId] });
+  }
+  return hass.callWS<HistoryStates>(params);
+};
+
 const equalState = (obj1: LineChartState, obj2: LineChartState) =>
   obj1.state === obj2.state &&
   // Only compare attributes if both states have an attributes object.
@@ -212,46 +268,47 @@ const equalState = (obj1: LineChartState, obj2: LineChartState) =>
 const processTimelineEntity = (
   localize: LocalizeFunc,
   language: FrontendLocaleData,
-  states: HassEntity[]
+  entityId: string,
+  states: EntityHistoryState[]
 ): TimelineEntity => {
   const data: TimelineState[] = [];
-  const last_element = states.length - 1;
-
+  const last: EntityHistoryState = states[states.length - 1];
   for (const state of states) {
-    if (data.length > 0 && state.state === data[data.length - 1].state) {
+    if (data.length > 0 && state.s === data[data.length - 1].state) {
       continue;
     }
-
-    // Copy the data from the last element as its the newest
-    // and is only needed to localize the data
-    if (!state.entity_id) {
-      state.attributes = states[last_element].attributes;
-      state.entity_id = states[last_element].entity_id;
-    }
-
     data.push({
-      state_localize: computeStateDisplay(localize, state, language),
-      state: state.state,
-      last_changed: state.last_changed,
+      state_localize: computeStateDisplayFromEntityAttributes(
+        localize,
+        language,
+        entityId,
+        state.a || last.a,
+        state.s
+      ),
+      state: state.s,
+      // lc (last_changed) may be omitted if its the same
+      // as lu (last_updated).
+      last_changed: (state.lc ? state.lc : state.lu) * 1000,
     });
   }
 
   return {
-    name: computeStateName(states[0]),
-    entity_id: states[0].entity_id,
+    name: computeStateNameFromEntityAttributes(entityId, states[0].a),
+    entity_id: entityId,
     data,
   };
 };
 
 const processLineChartEntities = (
   unit,
-  entities: HassEntity[][]
+  entities: HistoryStates
 ): LineChartUnit => {
   const data: LineChartEntity[] = [];
 
-  for (const states of entities) {
-    const last: HassEntity = states[states.length - 1];
-    const domain = computeStateDomain(last);
+  Object.keys(entities).forEach((entityId) => {
+    const states = entities[entityId];
+    const last: EntityHistoryState = states[states.length - 1];
+    const domain = computeDomain(entityId);
     const processedStates: LineChartState[] = [];
 
     for (const state of states) {
@@ -259,18 +316,24 @@ const processLineChartEntities = (
 
       if (DOMAINS_USE_LAST_UPDATED.includes(domain)) {
         processedState = {
-          state: state.state,
-          last_changed: state.last_updated,
+          state: state.s,
+          last_changed: state.lu * 1000,
           attributes: {},
         };
 
         for (const attr of LINE_ATTRIBUTES_TO_KEEP) {
-          if (attr in state.attributes) {
-            processedState.attributes![attr] = state.attributes[attr];
+          if (attr in state.a) {
+            processedState.attributes![attr] = state.a[attr];
           }
         }
       } else {
-        processedState = state;
+        processedState = {
+          state: state.s,
+          // lc (last_changed) may be omitted if its the same
+          // as lu (last_updated).
+          last_changed: (state.lc ? state.lc : state.lu) * 1000,
+          attributes: {},
+        };
       }
 
       if (
@@ -289,52 +352,53 @@ const processLineChartEntities = (
 
     data.push({
       domain,
-      name: computeStateName(last),
-      entity_id: last.entity_id,
+      name: computeStateNameFromEntityAttributes(entityId, last.a),
+      entity_id: entityId,
       states: processedStates,
     });
-  }
+  });
 
   return {
     unit,
-    identifier: entities.map((states) => states[0].entity_id).join(""),
+    identifier: Object.keys(entities).join(""),
     data,
   };
 };
 
 const stateUsesUnits = (state: HassEntity) =>
-  "unit_of_measurement" in state.attributes ||
-  "state_class" in state.attributes;
+  attributesHaveUnits(state.attributes);
+
+const attributesHaveUnits = (attributes: { [key: string]: any }) =>
+  "unit_of_measurement" in attributes || "state_class" in attributes;
 
 export const computeHistory = (
   hass: HomeAssistant,
-  stateHistory: HassEntity[][],
+  stateHistory: HistoryStates,
   localize: LocalizeFunc
 ): HistoryResult => {
-  const lineChartDevices: { [unit: string]: HassEntity[][] } = {};
+  const lineChartDevices: { [unit: string]: HistoryStates } = {};
   const timelineDevices: TimelineEntity[] = [];
   if (!stateHistory) {
     return { line: [], timeline: [] };
   }
-
-  stateHistory.forEach((stateInfo) => {
+  Object.keys(stateHistory).forEach((entityId) => {
+    const stateInfo = stateHistory[entityId];
     if (stateInfo.length === 0) {
       return;
     }
 
-    const entityId = stateInfo[0].entity_id;
     const currentState =
       entityId in hass.states ? hass.states[entityId] : undefined;
     const stateWithUnitorStateClass =
       !currentState &&
-      stateInfo.find((state) => state.attributes && stateUsesUnits(state));
+      stateInfo.find((state) => state.a && attributesHaveUnits(state.a));
 
     let unit: string | undefined;
 
     if (currentState && stateUsesUnits(currentState)) {
       unit = currentState.attributes.unit_of_measurement || " ";
     } else if (stateWithUnitorStateClass) {
-      unit = stateWithUnitorStateClass.attributes.unit_of_measurement || " ";
+      unit = stateWithUnitorStateClass.a.unit_of_measurement || " ";
     } else {
       unit = {
         climate: hass.config.unit_system.temperature,
@@ -348,12 +412,15 @@ export const computeHistory = (
 
     if (!unit) {
       timelineDevices.push(
-        processTimelineEntity(localize, hass.locale, stateInfo)
+        processTimelineEntity(localize, hass.locale, entityId, stateInfo)
       );
-    } else if (unit in lineChartDevices) {
-      lineChartDevices[unit].push(stateInfo);
+    } else if (unit in lineChartDevices && entityId in lineChartDevices[unit]) {
+      lineChartDevices[unit][entityId].push(...stateInfo);
     } else {
-      lineChartDevices[unit] = [stateInfo];
+      if (!(unit in lineChartDevices)) {
+        lineChartDevices[unit] = {};
+      }
+      lineChartDevices[unit][entityId] = stateInfo;
     }
   });
 
diff --git a/src/data/update.ts b/src/data/update.ts
index f888823d21..802c1d0554 100644
--- a/src/data/update.ts
+++ b/src/data/update.ts
@@ -7,7 +7,10 @@ import type {
 import { BINARY_STATE_ON } from "../common/const";
 import { computeDomain } from "../common/entity/compute_domain";
 import { computeStateDomain } from "../common/entity/compute_state_domain";
-import { supportsFeature } from "../common/entity/supports-feature";
+import {
+  supportsFeature,
+  supportsFeatureFromAttributes,
+} from "../common/entity/supports-feature";
 import { caseInsensitiveStringCompare } from "../common/string/compare";
 import { showAlertDialog } from "../dialogs/generic/show-dialog-box";
 import { HomeAssistant } from "../types";
@@ -35,8 +38,13 @@ export interface UpdateEntity extends HassEntityBase {
 }
 
 export const updateUsesProgress = (entity: UpdateEntity): boolean =>
-  supportsFeature(entity, UPDATE_SUPPORT_PROGRESS) &&
-  typeof entity.attributes.in_progress === "number";
+  updateUsesProgressFromAttributes(entity.attributes);
+
+export const updateUsesProgressFromAttributes = (attributes: {
+  [key: string]: any;
+}): boolean =>
+  supportsFeatureFromAttributes(attributes, UPDATE_SUPPORT_PROGRESS) &&
+  typeof attributes.in_progress === "number";
 
 export const updateCanInstall = (
   entity: UpdateEntity,
@@ -49,6 +57,11 @@ export const updateCanInstall = (
 export const updateIsInstalling = (entity: UpdateEntity): boolean =>
   updateUsesProgress(entity) || !!entity.attributes.in_progress;
 
+export const updateIsInstallingFromAttributes = (attributes: {
+  [key: string]: any;
+}): boolean =>
+  updateUsesProgressFromAttributes(attributes) || !!attributes.in_progress;
+
 export const updateReleaseNotes = (hass: HomeAssistant, entityId: string) =>
   hass.callWS<string | null>({
     type: "update/release_notes",
diff --git a/src/panels/history/ha-panel-history.ts b/src/panels/history/ha-panel-history.ts
index f47011d22a..c152af1c72 100644
--- a/src/panels/history/ha-panel-history.ts
+++ b/src/panels/history/ha-panel-history.ts
@@ -25,7 +25,7 @@ import "../../components/ha-date-range-picker";
 import type { DateRangePickerRanges } from "../../components/ha-date-range-picker";
 import "../../components/ha-icon-button";
 import "../../components/ha-menu-button";
-import { computeHistory, fetchDate } from "../../data/history";
+import { computeHistory, fetchDateWS } from "../../data/history";
 import "../../layouts/ha-app-layout";
 import { haStyle } from "../../resources/styles";
 import { HomeAssistant } from "../../types";
@@ -177,7 +177,7 @@ class HaPanelHistory extends LitElement {
 
   private async _getHistory() {
     this._isLoading = true;
-    const dateHistory = await fetchDate(
+    const dateHistory = await fetchDateWS(
       this.hass,
       this._startDate,
       this._endDate,