diff --git a/main-imports.rkt b/main-imports.rkt
new file mode 100644
index 0000000..f82f2ac
--- /dev/null
+++ b/main-imports.rkt
@@ -0,0 +1,16 @@
+#lang racket
+
+;; These are separated from main.rkt as a performance improvement:
+;; so they can be imported into the render.rkt namespace
+;; and cached for the benefit of the render eval function.
+
+
+(require racket/list)
+(require (planet mb/pollen/tools) (planet mb/pollen/main-helper))
+(require (only-in (planet mb/pollen/ptree-decode) ptree-source-decode))
+(require (only-in (planet mb/pollen/predicates) ptree?))
+
+(provide (all-from-out
+          racket/list
+           (planet mb/pollen/tools) (planet mb/pollen/main-helper)
+           (planet mb/pollen/ptree-decode)(planet mb/pollen/predicates)))
\ No newline at end of file
diff --git a/main-preproc-imports.rkt b/main-preproc-imports.rkt
new file mode 100644
index 0000000..4a9c9d2
--- /dev/null
+++ b/main-preproc-imports.rkt
@@ -0,0 +1,14 @@
+#lang racket
+
+;; These are separated from main-preproc.rkt as a performance improvement:
+;; so they can be imported into the render.rkt namespace
+;; and cached for the benefit of the render eval function.
+
+(require (only-in (planet mb/pollen/readability) ->list)
+         (only-in (planet mb/pollen/tools) trim)
+         (only-in (planet mb/pollen/predicates) whitespace?))
+
+(provide (all-from-out
+          (planet mb/pollen/readability)
+          (planet mb/pollen/tools)
+          (planet mb/pollen/predicates)))
\ No newline at end of file
diff --git a/main-preproc.rkt b/main-preproc.rkt
index 627304d..e6aeb0c 100644
--- a/main-preproc.rkt
+++ b/main-preproc.rkt
@@ -1,9 +1,6 @@
 #lang racket
 
-(require (only-in (planet mb/pollen/readability) ->list)
-         (only-in (planet mb/pollen/tools) trim)
-         (only-in (planet mb/pollen/predicates) whitespace?))
-
+(require "main-preproc-imports.rkt")
 (provide (except-out (all-from-out racket) #%module-begin)
          (rename-out [module-begin #%module-begin]))
 
diff --git a/main.rkt b/main.rkt
index 747df65..4d8d8c3 100644
--- a/main.rkt
+++ b/main.rkt
@@ -1,8 +1,5 @@
 #lang racket
-(require racket/list)
-(require (planet mb/pollen/tools) (planet mb/pollen/main-helper))
-(require (only-in (planet mb/pollen/ptree-decode) ptree-source-decode))
-(require (only-in (planet mb/pollen/predicates) ptree?))
+(require "main-imports.rkt")
 (provide (except-out (all-from-out racket) #%module-begin)
          (rename-out [module-begin #%module-begin]))
 
diff --git a/render.rkt b/render.rkt
index 4a49018..3496848 100644
--- a/render.rkt
+++ b/render.rkt
@@ -293,6 +293,8 @@
          (planet mb/pollen/debug)
          (planet mb/pollen/decode)
          (planet mb/pollen/file-tools)
+         (planet mb/pollen/main-imports)
+         (planet mb/pollen/main-preproc-imports)
          (planet mb/pollen/predicates)
          (planet mb/pollen/ptree-nav)
          (planet mb/pollen/ptree-decode)
@@ -337,6 +339,8 @@
            (planet mb/pollen/debug)
            (planet mb/pollen/decode)
            (planet mb/pollen/file-tools)
+           (planet mb/pollen/main-imports)
+           (planet mb/pollen/main-preproc-imports)
            (planet mb/pollen/predicates)
            (planet mb/pollen/ptree-nav)
            (planet mb/pollen/ptree-decode)