diff --git a/.gitignore b/.gitignore
index d3d4b6267..0853b5ab2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,6 @@ package-lock.json
 .node-version
 # When installing software on gitpod.io, `core.*` files are generated
 /core.*
+
+# For 0x flamegraph directory (https://github.com/davidmarkclements/0x)
+*.0x/
diff --git a/cspell.json b/cspell.json
index c29d0af75..2a58e552c 100644
--- a/cspell.json
+++ b/cspell.json
@@ -107,6 +107,7 @@
         "Filipe",
         "Fiorini",
         "Fisker",
+        "flamegraph",
         "foldgutter",
         "formatprg",
         "Friedly",