Fix performance regression in clear_modules! (#2685)

(cherry picked from commit 3684e46)

Author: fingolfin

CHANGELOG.md

@@ -5,9 +5,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
-## Fixed
+### Fixed
 
 * `@meta`, `@setup`, and `@docs` blocks no longer generate spurious entries in the search index. ([#1929], [#2675])
+* Fixed a performance regression introduced in v1.10.0 as part of the code clearing out the sandbox modules to save memory and caused by calling `GC.gc()` too often. ([#2685])
 
 ## Version [v1.10.1] - 2025-03-31
 

src/expander_pipeline.jl

@@ -24,7 +24,6 @@ function clear_modules!(d::Dict{Symbol, Any})
         startswith(String(k), "__atexample__") || continue
         v isa Module && clear_module!(v)
     end
-    GC.gc()
     return
 end