diff --git a/services/document-updater/test/stress/js/run.js b/services/document-updater/test/stress/js/run.js
index da569f17d5..3ce482b19b 100644
--- a/services/document-updater/test/stress/js/run.js
+++ b/services/document-updater/test/stress/js/run.js
@@ -16,278 +16,376 @@
  * DS207: Consider shorter variations of null checks
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
-const DocUpdaterClient = require("../../acceptance/coffee/helpers/DocUpdaterClient");
+const DocUpdaterClient = require('../../acceptance/coffee/helpers/DocUpdaterClient')
 // MockTrackChangesApi = require "../../acceptance/js/helpers/MockTrackChangesApi"
 // MockWebApi = require "../../acceptance/js/helpers/MockWebApi"
-const assert = require("assert");
-const async = require("async");
+const assert = require('assert')
+const async = require('async')
 
-const insert = function(string, pos, content) {
-	const result = string.slice(0, pos) + content + string.slice(pos);
-	return result;
-};
+const insert = function (string, pos, content) {
+  const result = string.slice(0, pos) + content + string.slice(pos)
+  return result
+}
 
-const transform = function(op1, op2) {
-	if (op2.p < op1.p) {
-		return {
-			p: op1.p + op2.i.length,
-			i: op1.i
-		};
-	} else {
-		return op1;
-	}
-};
+const transform = function (op1, op2) {
+  if (op2.p < op1.p) {
+    return {
+      p: op1.p + op2.i.length,
+      i: op1.i
+    }
+  } else {
+    return op1
+  }
+}
 
 class StressTestClient {
-	constructor(options) {
-		if (options == null) { options = {}; }
-		this.options = options;
-		if (this.options.updateDelay == null) { this.options.updateDelay = 200; }
-		this.project_id = this.options.project_id || DocUpdaterClient.randomId();
-		this.doc_id = this.options.doc_id || DocUpdaterClient.randomId();
-		this.pos = this.options.pos || 0;
-		this.content = this.options.content || "";
+  constructor(options) {
+    if (options == null) {
+      options = {}
+    }
+    this.options = options
+    if (this.options.updateDelay == null) {
+      this.options.updateDelay = 200
+    }
+    this.project_id = this.options.project_id || DocUpdaterClient.randomId()
+    this.doc_id = this.options.doc_id || DocUpdaterClient.randomId()
+    this.pos = this.options.pos || 0
+    this.content = this.options.content || ''
 
-		this.client_id = DocUpdaterClient.randomId();
-		this.version = this.options.version || 0;
-		this.inflight_op = null;
-		this.charCode = 0;
-		
-		this.counts = {
-			conflicts: 0,
-			local_updates: 0,
-			remote_updates: 0,
-			max_delay: 0
-		};
-		
-		DocUpdaterClient.subscribeToAppliedOps((channel, update) => {
-			update = JSON.parse(update);
-			if (update.error != null) {
-				console.error(new Error(`Error from server: '${update.error}'`));
-				return;
-			}
-			if (update.doc_id === this.doc_id) {
-				return this.processReply(update);
-			}
-		});
-	}
-	
-	sendUpdate() {
-		const data = String.fromCharCode(65 + (this.charCode++ % 26));
-		this.content = insert(this.content, this.pos, data);
-		this.inflight_op = {
-			i: data,
-			p: this.pos++
-		};
-		this.resendUpdate();
-		return this.inflight_op_sent = Date.now();
-	}
-	
-	resendUpdate() {
-		assert(this.inflight_op != null);
-		DocUpdaterClient.sendUpdate(
-			this.project_id, this.doc_id,
-			{
-				doc: this.doc_id,
-				op: [this.inflight_op],
-				v: this.version,
-				meta: {
-					source: this.client_id
-				},
-				dupIfSource: [this.client_id]
-			}
-		);
-		return this.update_timer = setTimeout(() => {
-			console.log(`[${new Date()}] \t[${this.client_id.slice(0,4)}] WARN: Resending update after 5 seconds`);
-			return this.resendUpdate();
-		}
-		, 5000);
-	}
-	
-	processReply(update) {
-		if (update.op.v !== this.version) {
-			if (update.op.v < this.version) {
-				console.log(`[${new Date()}] \t[${this.client_id.slice(0,4)}] WARN: Duplicate ack (already seen version)`);
-				return;
-			} else {
-				console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] ERROR: Version jumped ahead (client: ${this.version}, op: ${update.op.v})`);
-			}
-		}
-		this.version++;
-		if (update.op.meta.source === this.client_id) {
-			if (this.inflight_op != null) {
-				this.counts.local_updates++;
-				this.inflight_op = null;
-				clearTimeout(this.update_timer);
-				const delay = Date.now() - this.inflight_op_sent;
-				this.counts.max_delay = Math.max(this.counts.max_delay, delay);
-				return this.continue();
-			} else {
-				return console.log(`[${new Date()}] \t[${this.client_id.slice(0,4)}] WARN: Duplicate ack`);
-			}
-		} else {
-			assert(update.op.op.length === 1);
-			this.counts.remote_updates++;
-			let external_op = update.op.op[0];
-			if (this.inflight_op != null) {
-				this.counts.conflicts++;
-				this.inflight_op = transform(this.inflight_op, external_op);
-				external_op = transform(external_op, this.inflight_op);
-			}
-			if (external_op.p < this.pos) {
-				this.pos += external_op.i.length;
-			}
-			return this.content = insert(this.content, external_op.p, external_op.i);
-		}
-	}
-	
-	continue() {
-		if (this.updateCount > 0) {
-			this.updateCount--;
-			return setTimeout(() => {
-				return this.sendUpdate();
-			}
-			, this.options.updateDelay * ( 0.5 + Math.random() ));
-		} else {
-			return this.updateCallback();
-		}
-	}
-	
-	runForNUpdates(n, callback) {
-		if (callback == null) { callback = function(error) {}; }
-		this.updateCallback = callback;
-		this.updateCount = n;
-		return this.continue();
-	}
-	
-	check(callback) {
-		if (callback == null) { callback = function(error) {}; }
-		return DocUpdaterClient.getDoc(this.project_id, this.doc_id, (error, res, body) => {
-			if (error != null) { throw error; }
-			if ((body.lines == null)) {
-				return console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] ERROR: Invalid response from get doc (${doc_id})`, body);
-			}
-			const content = body.lines.join("\n");
-			const {
-                version
-            } = body;
-			if (content !== this.content) {
-				if (version === this.version) {
-					console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] Error: Client content does not match server.`);
-					console.error(`Server: ${content.split('a')}`);
-					console.error(`Client: ${this.content.split('a')}`);
-				} else {
-					console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] Error: Version mismatch (Server: '${version}', Client: '${this.version}')`);
-				}
-			}
+    this.client_id = DocUpdaterClient.randomId()
+    this.version = this.options.version || 0
+    this.inflight_op = null
+    this.charCode = 0
 
-			if (!this.isContentValid(this.content)) {
-				const iterable = this.content.split("");
-				for (let i = 0; i < iterable.length; i++) {
-					const chunk = iterable[i];
-					if ((chunk != null) && (chunk !== "a")) {
-						console.log(chunk, i);
-					}
-				}
-				throw new Error("bad content");
-			}
-			return callback();
-		});
-	}
+    this.counts = {
+      conflicts: 0,
+      local_updates: 0,
+      remote_updates: 0,
+      max_delay: 0
+    }
 
-	isChunkValid(chunk) {
-		const char = 0;
-		for (let i = 0; i < chunk.length; i++) {
-			const letter = chunk[i];
-			if (letter.charCodeAt(0) !== (65 + (i % 26))) {
-				console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] Invalid Chunk:`, chunk);
-				return false;
-			}
-		}
-		return true;
-	}
+    DocUpdaterClient.subscribeToAppliedOps((channel, update) => {
+      update = JSON.parse(update)
+      if (update.error != null) {
+        console.error(new Error(`Error from server: '${update.error}'`))
+        return
+      }
+      if (update.doc_id === this.doc_id) {
+        return this.processReply(update)
+      }
+    })
+  }
 
-	isContentValid(content) {
-		for (const chunk of Array.from(content.split('a'))) {
-			if ((chunk != null) && (chunk !== "")) {
-				if (!this.isChunkValid(chunk)) {
-					
-					console.error(`[${new Date()}] \t[${this.client_id.slice(0,4)}] Invalid content`, content);
-					return false;
-				}
-			}
-		}
-		return true;
-	}
+  sendUpdate() {
+    const data = String.fromCharCode(65 + (this.charCode++ % 26))
+    this.content = insert(this.content, this.pos, data)
+    this.inflight_op = {
+      i: data,
+      p: this.pos++
+    }
+    this.resendUpdate()
+    return (this.inflight_op_sent = Date.now())
+  }
+
+  resendUpdate() {
+    assert(this.inflight_op != null)
+    DocUpdaterClient.sendUpdate(this.project_id, this.doc_id, {
+      doc: this.doc_id,
+      op: [this.inflight_op],
+      v: this.version,
+      meta: {
+        source: this.client_id
+      },
+      dupIfSource: [this.client_id]
+    })
+    return (this.update_timer = setTimeout(() => {
+      console.log(
+        `[${new Date()}] \t[${this.client_id.slice(
+          0,
+          4
+        )}] WARN: Resending update after 5 seconds`
+      )
+      return this.resendUpdate()
+    }, 5000))
+  }
+
+  processReply(update) {
+    if (update.op.v !== this.version) {
+      if (update.op.v < this.version) {
+        console.log(
+          `[${new Date()}] \t[${this.client_id.slice(
+            0,
+            4
+          )}] WARN: Duplicate ack (already seen version)`
+        )
+        return
+      } else {
+        console.error(
+          `[${new Date()}] \t[${this.client_id.slice(
+            0,
+            4
+          )}] ERROR: Version jumped ahead (client: ${this.version}, op: ${
+            update.op.v
+          })`
+        )
+      }
+    }
+    this.version++
+    if (update.op.meta.source === this.client_id) {
+      if (this.inflight_op != null) {
+        this.counts.local_updates++
+        this.inflight_op = null
+        clearTimeout(this.update_timer)
+        const delay = Date.now() - this.inflight_op_sent
+        this.counts.max_delay = Math.max(this.counts.max_delay, delay)
+        return this.continue()
+      } else {
+        return console.log(
+          `[${new Date()}] \t[${this.client_id.slice(
+            0,
+            4
+          )}] WARN: Duplicate ack`
+        )
+      }
+    } else {
+      assert(update.op.op.length === 1)
+      this.counts.remote_updates++
+      let external_op = update.op.op[0]
+      if (this.inflight_op != null) {
+        this.counts.conflicts++
+        this.inflight_op = transform(this.inflight_op, external_op)
+        external_op = transform(external_op, this.inflight_op)
+      }
+      if (external_op.p < this.pos) {
+        this.pos += external_op.i.length
+      }
+      return (this.content = insert(this.content, external_op.p, external_op.i))
+    }
+  }
+
+  continue() {
+    if (this.updateCount > 0) {
+      this.updateCount--
+      return setTimeout(() => {
+        return this.sendUpdate()
+      }, this.options.updateDelay * (0.5 + Math.random()))
+    } else {
+      return this.updateCallback()
+    }
+  }
+
+  runForNUpdates(n, callback) {
+    if (callback == null) {
+      callback = function (error) {}
+    }
+    this.updateCallback = callback
+    this.updateCount = n
+    return this.continue()
+  }
+
+  check(callback) {
+    if (callback == null) {
+      callback = function (error) {}
+    }
+    return DocUpdaterClient.getDoc(
+      this.project_id,
+      this.doc_id,
+      (error, res, body) => {
+        if (error != null) {
+          throw error
+        }
+        if (body.lines == null) {
+          return console.error(
+            `[${new Date()}] \t[${this.client_id.slice(
+              0,
+              4
+            )}] ERROR: Invalid response from get doc (${doc_id})`,
+            body
+          )
+        }
+        const content = body.lines.join('\n')
+        const { version } = body
+        if (content !== this.content) {
+          if (version === this.version) {
+            console.error(
+              `[${new Date()}] \t[${this.client_id.slice(
+                0,
+                4
+              )}] Error: Client content does not match server.`
+            )
+            console.error(`Server: ${content.split('a')}`)
+            console.error(`Client: ${this.content.split('a')}`)
+          } else {
+            console.error(
+              `[${new Date()}] \t[${this.client_id.slice(
+                0,
+                4
+              )}] Error: Version mismatch (Server: '${version}', Client: '${
+                this.version
+              }')`
+            )
+          }
+        }
+
+        if (!this.isContentValid(this.content)) {
+          const iterable = this.content.split('')
+          for (let i = 0; i < iterable.length; i++) {
+            const chunk = iterable[i]
+            if (chunk != null && chunk !== 'a') {
+              console.log(chunk, i)
+            }
+          }
+          throw new Error('bad content')
+        }
+        return callback()
+      }
+    )
+  }
+
+  isChunkValid(chunk) {
+    const char = 0
+    for (let i = 0; i < chunk.length; i++) {
+      const letter = chunk[i]
+      if (letter.charCodeAt(0) !== 65 + (i % 26)) {
+        console.error(
+          `[${new Date()}] \t[${this.client_id.slice(0, 4)}] Invalid Chunk:`,
+          chunk
+        )
+        return false
+      }
+    }
+    return true
+  }
+
+  isContentValid(content) {
+    for (const chunk of Array.from(content.split('a'))) {
+      if (chunk != null && chunk !== '') {
+        if (!this.isChunkValid(chunk)) {
+          console.error(
+            `[${new Date()}] \t[${this.client_id.slice(0, 4)}] Invalid content`,
+            content
+          )
+          return false
+        }
+      }
+    }
+    return true
+  }
 }
 
+const checkDocument = function (project_id, doc_id, clients, callback) {
+  if (callback == null) {
+    callback = function (error) {}
+  }
+  const jobs = clients.map((client) => (cb) => client.check(cb))
+  return async.parallel(jobs, callback)
+}
 
-const checkDocument = function(project_id, doc_id, clients, callback) {
-	if (callback == null) { callback = function(error) {}; }
-	const jobs = clients.map(client => cb => client.check(cb));
-	return async.parallel(jobs, callback);
-};
+const printSummary = function (doc_id, clients) {
+  const slot = require('cluster-key-slot')
+  const now = new Date()
+  console.log(
+    `[${now}] [${doc_id.slice(0, 4)} (slot: ${slot(doc_id)})] ${
+      clients.length
+    } clients...`
+  )
+  return (() => {
+    const result = []
+    for (const client of Array.from(clients)) {
+      console.log(
+        `[${now}] \t[${client.client_id.slice(0, 4)}] { local: ${
+          client.counts.local_updates
+        }, remote: ${client.counts.remote_updates}, conflicts: ${
+          client.counts.conflicts
+        }, max_delay: ${client.counts.max_delay} }`
+      )
+      result.push(
+        (client.counts = {
+          local_updates: 0,
+          remote_updates: 0,
+          conflicts: 0,
+          max_delay: 0
+        })
+      )
+    }
+    return result
+  })()
+}
 
-const printSummary = function(doc_id, clients) {
-	const slot = require('cluster-key-slot');
-	const now = new Date();
-	console.log(`[${now}] [${doc_id.slice(0,4)} (slot: ${slot(doc_id)})] ${clients.length} clients...`);
-	return (() => {
-		const result = [];
-		for (const client of Array.from(clients)) {
-			console.log(`[${now}] \t[${client.client_id.slice(0,4)}] { local: ${client.counts.local_updates }, remote: ${client.counts.remote_updates}, conflicts: ${client.counts.conflicts}, max_delay: ${client.counts.max_delay} }`);
-			result.push(client.counts = {
-				local_updates: 0,
-				remote_updates: 0,
-				conflicts: 0,
-				max_delay: 0
-			});
-		}
-		return result;
-	})();
-};
-
-const CLIENT_COUNT = parseInt(process.argv[2], 10);
-const UPDATE_DELAY = parseInt(process.argv[3], 10);
-const SAMPLE_INTERVAL = parseInt(process.argv[4], 10);
+const CLIENT_COUNT = parseInt(process.argv[2], 10)
+const UPDATE_DELAY = parseInt(process.argv[3], 10)
+const SAMPLE_INTERVAL = parseInt(process.argv[4], 10)
 
 for (const doc_and_project_id of Array.from(process.argv.slice(5))) {
-	(function(doc_and_project_id) {
-		const [project_id, doc_id] = Array.from(doc_and_project_id.split(":"));
-		console.log({project_id, doc_id});
-		return DocUpdaterClient.setDocLines(project_id, doc_id, [(new Array(CLIENT_COUNT + 2)).join('a')], null, null, (error) => {
-			if (error != null) { throw error; }
-			return DocUpdaterClient.getDoc(project_id, doc_id, (error, res, body) => {
-				let runBatch;
-				if (error != null) { throw error; }
-				if ((body.lines == null)) {
-					return console.error(`[${new Date()}] ERROR: Invalid response from get doc (${doc_id})`, body);
-				}
-				const content = body.lines.join("\n");
-				const {
-                    version
-                } = body;
-			
-				const clients = [];
-				for (let pos = 1, end = CLIENT_COUNT, asc = end >= 1; asc ? pos <= end : pos >= end; asc ? pos++ : pos--) {
-					(function(pos) {
-						const client = new StressTestClient({doc_id, project_id, content, pos, version, updateDelay: UPDATE_DELAY});
-						return clients.push(client);
-					})(pos);
-				}
-				
-				return (runBatch = function() {
-					const jobs = clients.map(client => cb => client.runForNUpdates(SAMPLE_INTERVAL / UPDATE_DELAY, cb));
-					return async.parallel(jobs, (error) => {
-						if (error != null) { throw error; }
-						printSummary(doc_id, clients);
-						return checkDocument(project_id, doc_id, clients, (error) => {
-							if (error != null) { throw error; }
-							return runBatch();
-						});
-					});
-				})();
-			});
-		});
-	})(doc_and_project_id);
+  ;(function (doc_and_project_id) {
+    const [project_id, doc_id] = Array.from(doc_and_project_id.split(':'))
+    console.log({ project_id, doc_id })
+    return DocUpdaterClient.setDocLines(
+      project_id,
+      doc_id,
+      [new Array(CLIENT_COUNT + 2).join('a')],
+      null,
+      null,
+      (error) => {
+        if (error != null) {
+          throw error
+        }
+        return DocUpdaterClient.getDoc(
+          project_id,
+          doc_id,
+          (error, res, body) => {
+            let runBatch
+            if (error != null) {
+              throw error
+            }
+            if (body.lines == null) {
+              return console.error(
+                `[${new Date()}] ERROR: Invalid response from get doc (${doc_id})`,
+                body
+              )
+            }
+            const content = body.lines.join('\n')
+            const { version } = body
+
+            const clients = []
+            for (
+              let pos = 1, end = CLIENT_COUNT, asc = end >= 1;
+              asc ? pos <= end : pos >= end;
+              asc ? pos++ : pos--
+            ) {
+              ;(function (pos) {
+                const client = new StressTestClient({
+                  doc_id,
+                  project_id,
+                  content,
+                  pos,
+                  version,
+                  updateDelay: UPDATE_DELAY
+                })
+                return clients.push(client)
+              })(pos)
+            }
+
+            return (runBatch = function () {
+              const jobs = clients.map((client) => (cb) =>
+                client.runForNUpdates(SAMPLE_INTERVAL / UPDATE_DELAY, cb)
+              )
+              return async.parallel(jobs, (error) => {
+                if (error != null) {
+                  throw error
+                }
+                printSummary(doc_id, clients)
+                return checkDocument(project_id, doc_id, clients, (error) => {
+                  if (error != null) {
+                    throw error
+                  }
+                  return runBatch()
+                })
+              })
+            })()
+          }
+        )
+      }
+    )
+  })(doc_and_project_id)
 }