diff --git a/VERSION b/VERSION
index 306894a1..04757a5d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-6.4.1
\ No newline at end of file
+6.4.2
\ No newline at end of file
diff --git a/licenses/BSL.txt b/licenses/BSL.txt
index 96562886..6530febd 100644
--- a/licenses/BSL.txt
+++ b/licenses/BSL.txt
@@ -4,7 +4,7 @@ Parameters
 
 Licensor:             Rocicorp, LLC
 
-Licensed Work:        replicache 6.4.1
+Licensed Work:        replicache 6.4.2
                       The Licensed Work is (c) 2020 Rocicorp, LLC.
 
 Additional Use Grant: You may make use of the Licensed Work, provided you
diff --git a/package-lock.json b/package-lock.json
index 707f6ee3..20718db4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,11 +1,11 @@
 {
   "name": "replicache",
-  "version": "6.4.1",
+  "version": "6.4.2",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "6.4.1",
+      "version": "6.4.2",
       "license": "BSL-1.1",
       "devDependencies": {
         "@esm-bundle/chai": "^4.3.4",
diff --git a/package.json b/package.json
index fc89730a..7d312625 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "replicache",
   "description": "Realtime sync for any backend stack",
-  "version": "6.4.1",
+  "version": "6.4.2",
   "repository": "github:rocicorp/replicache",
   "license": "BSL-1.1",
   "scripts": {
diff --git a/perf/node_modules b/perf/node_modules
deleted file mode 120000
index 68a084ad..00000000
--- a/perf/node_modules
+++ /dev/null
@@ -1 +0,0 @@
-../node_modules
\ No newline at end of file
diff --git a/perf/package-lock.json b/perf/package-lock.json
deleted file mode 100644
index 3cd882a9..00000000
--- a/perf/package-lock.json
+++ /dev/null
@@ -1,60 +0,0 @@
-{
-  "name": "perf",
-  "version": "1.0.0",
-  "lockfileVersion": 2,
-  "requires": true,
-  "packages": {
-    "": {
-      "version": "1.0.0",
-      "license": "ISC",
-      "dependencies": {
-        "idb": "^6.0.0",
-        "typescript": "^4.2.3",
-        "xbytes": "^1.7.0"
-      },
-      "devDependencies": {}
-    },
-    "node_modules/idb": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/idb/-/idb-6.0.0.tgz",
-      "integrity": "sha512-+M367poGtpzAylX4pwcrZIa7cFQLfNkAOlMMLN2kw/2jGfJP6h+TB/unQNSVYwNtP8XqkLYrfuiVnxLQNP1tjA=="
-    },
-    "node_modules/typescript": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.3.tgz",
-      "integrity": "sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw==",
-      "bin": {
-        "tsc": "bin/tsc",
-        "tsserver": "bin/tsserver"
-      },
-      "engines": {
-        "node": ">=4.2.0"
-      }
-    },
-    "node_modules/xbytes": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/xbytes/-/xbytes-1.7.0.tgz",
-      "integrity": "sha512-iZglBXuHoC1F7jRz7746QhicNE167tEVq2H/iYQ1jIFdYIjqL8OfM86K52csfRZm+d83/VJO8bu37jN/G1ekKQ==",
-      "engines": {
-        "node": ">=1"
-      }
-    }
-  },
-  "dependencies": {
-    "idb": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/idb/-/idb-6.0.0.tgz",
-      "integrity": "sha512-+M367poGtpzAylX4pwcrZIa7cFQLfNkAOlMMLN2kw/2jGfJP6h+TB/unQNSVYwNtP8XqkLYrfuiVnxLQNP1tjA=="
-    },
-    "typescript": {
-      "version": "4.2.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.2.3.tgz",
-      "integrity": "sha512-qOcYwxaByStAWrBf4x0fibwZvMRG+r4cQoTjbPtUlrWjBHbmCAww1i448U0GJ+3cNNEtebDteo/cHOR3xJ4wEw=="
-    },
-    "xbytes": {
-      "version": "1.7.0",
-      "resolved": "https://registry.npmjs.org/xbytes/-/xbytes-1.7.0.tgz",
-      "integrity": "sha512-iZglBXuHoC1F7jRz7746QhicNE167tEVq2H/iYQ1jIFdYIjqL8OfM86K52csfRZm+d83/VJO8bu37jN/G1ekKQ=="
-    }
-  }
-}
diff --git a/perf/package.json b/perf/package.json
deleted file mode 100644
index 3dbc1ca5..00000000
--- a/perf/package.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "type": "module"
-}
diff --git a/perf/tsconfig.json b/perf/tsconfig.json
deleted file mode 100644
index 1cbf549c..00000000
--- a/perf/tsconfig.json
+++ /dev/null
@@ -1,19 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "ES2018",
-    "noEmit": true,
-    "module": "ESNext",
-    "strict": true,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noImplicitReturns": true,
-    "noFallthroughCasesInSwitch": true,
-    "importsNotUsedAsValues": "error",
-    "forceConsistentCasingInFileNames": true,
-    "moduleResolution": "node",
-    "checkJs": true,
-    "lib": ["dom", "esnext"],
-    "preserveSymlinks": true,
-    "allowSyntheticDefaultImports": true
-  }
-}