diff --git a/.circleci/script/gen_ci.clj b/.circleci/script/gen_ci.clj
index dee3fe60..5ba9ce5e 100644
--- a/.circleci/script/gen_ci.clj
+++ b/.circleci/script/gen_ci.clj
@@ -170,9 +170,10 @@ java -jar \"$jar\" --config .build/bb.edn --deps-root . release-artifact \"$refl
                                                      (str base-install-cmd "\nsudo -E script/setup-musl")
                                                      base-install-cmd)))
                                             (run "Download GraalVM" "script/install-graalvm")
+                                            (run "Download iprof" "curl -sLO 'https://github.com/babashka/pgo-profiles/releases/download/2023.09.27/default.iprof'")
                                             (run "Build binary" (if (= "aarch64" arch)
-                                                                  "script/uberjar\nscript/compile -H:PageSize=64K"
-                                                                  "script/uberjar\nscript/compile") "30m")
+                                                                  "script/uberjar\nscript/compile -H:PageSize=64K --pgo=default.iprof"
+                                                                  "script/uberjar\nscript/compile --pgo=default.iprof") "30m")
                                             (run "Run tests" "script/test\nscript/run_lib_tests")
                                             (run "Release" ".circleci/script/release")
                                             {:persist_to_workspace {:root  "/tmp"
diff --git a/.cirrus.yml b/.cirrus.yml
index 2c9f9700..4fb8ebc4 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -25,7 +25,8 @@ task:
     java -version
 
     script/uberjar
-    script/compile
+    curl -sLO 'https://github.com/babashka/pgo-profiles/releases/download/2023.09.27/default.iprof'
+    script/compile --pgo=default.iprof
 
     # script/test
     # script/run_lib_tests
diff --git a/.gitignore b/.gitignore
index ae6b5d4a..b5cf81da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,3 +37,4 @@ target
 .nrepl-port
 .DS_Store
 .portal
+default.iprof
diff --git a/appveyor.yml b/appveyor.yml
index 49a27c2f..be3a9918 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -41,6 +41,8 @@ build_script:
 - cmd: >-
     powershell -Command "if (Test-Path('graalvm')) { return } else { (New-Object Net.WebClient).DownloadFile('https://download.oracle.com/graalvm/21/archive/graalvm-jdk-21_windows-x64_bin.zip', 'graalvm.zip') }"
 
+    powershell -Command "if (Test-Path('iprof.default')) { return } else { (New-Object Net.WebClient).DownloadFile('https://github.com/babashka/pgo-profiles/releases/download/2023.09.27/default.iprof', 'default.iprof') }"
+
     powershell -Command "if (Test-Path('graalvm')) { return } else { Expand-Archive graalvm.zip graalvm }"
 
 - cmd: >-
@@ -58,7 +60,7 @@ build_script:
 - cmd: >-
     call script/uberjar.bat
 
-    call script/compile.bat
+    call script/compile.bat --pgo=default.iprof
 
     echo Creating zip archive
 
diff --git a/script/compile.bat b/script/compile.bat
index 5a257676..db34b98a 100644
--- a/script/compile.bat
+++ b/script/compile.bat
@@ -32,7 +32,8 @@ call %GRAALVM_HOME%\bin\native-image.cmd ^
   "--enable-preview" ^
   "--install-exit-handlers" ^
   "-O1" ^
-  "%BABASHKA_XMX%"
+  "%BABASHKA_XMX%" ^
+  %*
 
 if %errorlevel% neq 0 exit /b %errorlevel%