diff --git a/lib/index.js b/lib/index.js
index 668f559..2a4e083 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -3,6 +3,7 @@
 // class handles all the IO with the registry and cache.
 const pacote = require('pacote')
 const cacache = require('cacache')
+const { time } = require('proc-log')
 const Advisory = require('./advisory.js')
 const { homedir } = require('os')
 const jsonParse = require('json-parse-even-better-errors')
@@ -48,34 +49,33 @@ class Calculator {
 
   async [_calculate] (name, source) {
     const k = `security-advisory:${name}:${source.id}`
-    const t = `metavuln:calculate:${k}`
-    process.emit('time', t)
+    const timeEnd = time.start(`metavuln:calculate:${k}`)
     const advisory = new Advisory(name, source, this[_options])
     // load packument and cached advisory
     const [cached, packument] = await Promise.all([
       this[_cacheGet](advisory),
       this[_packument](name),
     ])
-    process.emit('time', `metavuln:load:${k}`)
+    const timeEndLoad = time.start(`metavuln:load:${k}`)
     advisory.load(cached, packument)
-    process.emit('timeEnd', `metavuln:load:${k}`)
+    timeEndLoad()
     if (advisory.updated) {
       await this[_cachePut](advisory)
     }
     this[_advisories].set(k, advisory)
-    process.emit('timeEnd', t)
+    timeEnd()
     return advisory
   }
 
   async [_cachePut] (advisory) {
     const { name, id } = advisory
     const key = `security-advisory:${name}:${id}`
-    process.emit('time', `metavuln:cache:put:${key}`)
+    const timeEnd = time.start(`metavuln:cache:put:${key}`)
     const data = JSON.stringify(advisory)
     const options = { ...this[_options] }
     this[_cacheData].set(key, jsonParse(data))
     await cacache.put(this[_cache], key, data, options).catch(() => {})
-    process.emit('timeEnd', `metavuln:cache:put:${key}`)
+    timeEnd()
   }
 
   async [_cacheGet] (advisory) {
@@ -87,12 +87,12 @@ class Calculator {
       return this[_cacheData].get(key)
     }
 
-    process.emit('time', `metavuln:cache:get:${key}`)
+    const timeEnd = time.start(`metavuln:cache:get:${key}`)
     const p = cacache.get(this[_cache], key, { ...this[_options] })
       .catch(() => ({ data: '{}' }))
       .then(({ data }) => {
         data = jsonParse(data)
-        process.emit('timeEnd', `metavuln:cache:get:${key}`)
+        timeEnd()
         this[_cacheData].set(key, data)
         return data
       })
@@ -105,7 +105,7 @@ class Calculator {
       return this[_packuments].get(name)
     }
 
-    process.emit('time', `metavuln:packument:${name}`)
+    const timeEnd = time.start(`metavuln:packument:${name}`)
     const p = pacote.packument(name, { ...this[_options] })
       .catch((er) => {
         // presumably not something from the registry.
@@ -116,7 +116,7 @@ class Calculator {
         }
       })
       .then(paku => {
-        process.emit('timeEnd', `metavuln:packument:${name}`)
+        timeEnd()
         this[_packuments].set(name, paku)
         return paku
       })