diff --git a/src/config/util.ts b/src/config/util.ts
index e09aa51c3..b0b2e8152 100644
--- a/src/config/util.ts
+++ b/src/config/util.ts
@@ -107,7 +107,7 @@ export function getCommandIdPermutations(commandId: string): string[] {
  * @param commandIds string[]
  * @returns string[]
  */
-export function collectUsableIds(commandIds: string[]): string[] {
+export function collectUsableIds(commandIds: string[]): Set<string> {
   const usuableIds: string[] = []
   for (const id of commandIds) {
     const parts = id.split(':')
@@ -118,5 +118,5 @@ export function collectUsableIds(commandIds: string[]): string[] {
     }
   }
 
-  return uniq(usuableIds).sort()
+  return new Set(usuableIds)
 }
diff --git a/src/help/util.ts b/src/help/util.ts
index 6fcb6d3f5..ffa0b7cd7 100644
--- a/src/help/util.ts
+++ b/src/help/util.ts
@@ -44,7 +44,7 @@ function collateSpacedCmdIDFromArgs(argv: string[], config: IConfig): string[] {
     const ids = collectUsableIds(config.commandIDs)
 
     const final: string[] = []
-    const idPresent = (id: string) => ids.includes(id)
+    const idPresent = (id: string) => ids.has(id)
     const isFlag = (s: string) => s.startsWith('-')
     const isArgWithValue = (s: string) => s.includes('=')
     const finalizeId = (s?: string) => s ? [...final, s].join(':') : final.join(':')
diff --git a/test/config/util.test.ts b/test/config/util.test.ts
index 847a4f290..22152e9c9 100644
--- a/test/config/util.test.ts
+++ b/test/config/util.test.ts
@@ -6,14 +6,14 @@ describe('util', () => {
     test
     .it('returns all usable command ids', async () => {
       const ids = collectUsableIds(['foo:bar:baz', 'one:two:three'])
-      expect(ids).to.deep.equal([
+      expect(ids).to.deep.equal(new Set([
         'foo',
         'foo:bar',
         'foo:bar:baz',
         'one',
         'one:two',
         'one:two:three',
-      ])
+      ]))
     })
   })
 
diff --git a/yarn.lock b/yarn.lock
index 149731e7c..35d5b2576 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -642,16 +642,11 @@
   resolved "https://registry.yarnpkg.com/@types/js-yaml/-/js-yaml-3.12.7.tgz#330c5d97a3500e9c903210d6e49f02964af04a0e"
   integrity sha512-S6+8JAYTE1qdsc9HMVsfY7+SgSuUU/Tp6TYTmITW0PZxiyIMvol3Gy//y69Wkhs0ti4py5qgR3uZH6uz/DNzJQ==
 
-"@types/json-schema@*":
+"@types/json-schema@*", "@types/json-schema@^7.0.7":
   version "7.0.11"
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.11.tgz#d421b6c527a3037f7c84433fd2c4229e016863d3"
   integrity sha512-wOuvG1SN4Us4rez+tylwwwCV1psiNVOkJeM3AUWUNWg/jDQY2+HE/444y5gc+jBmRqASOm2Oeh5c1axHobwRKQ==
 
-"@types/json-schema@^7.0.7":
-  version "7.0.9"
-  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.9.tgz#97edc9037ea0c38585320b28964dde3b39e4660d"
-  integrity sha512-qcUXuemtEu+E5wZSJHNxUXeCZhAfXKQ41D+duX+VYPde7xyEVZci+/oXKJL13tnRs9lR2pr4fod59GT6/X1/yQ==
-
 "@types/lodash@*":
   version "4.14.182"
   resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.182.tgz#05301a4d5e62963227eaafe0ce04dd77c54ea5c2"