diff --git a/src/wasm/ngx_wasm_core_module.c b/src/wasm/ngx_wasm_core_module.c
index d68c00e27..cd7f8d80b 100644
--- a/src/wasm/ngx_wasm_core_module.c
+++ b/src/wasm/ngx_wasm_core_module.c
@@ -52,6 +52,14 @@ static ngx_command_t  ngx_wasm_core_commands[] = {
       0,
       NULL },
 
+    { ngx_string("cache_config"),
+      NGX_WASMTIME_CONF|NGX_CONF_TAKE1,
+      ngx_conf_set_str_slot,
+      NGX_WA_WASM_CONF_OFFSET,
+      offsetof(ngx_wasm_core_conf_t, vm_conf)
+      + offsetof(ngx_wavm_conf_t, cache_config),
+      NULL },
+
     { ngx_string("compiler"),
       NGX_WASM_CONF|NGX_CONF_TAKE1,
       ngx_conf_set_str_slot,
diff --git a/src/wasm/wrt/ngx_wrt.h b/src/wasm/wrt/ngx_wrt.h
index 1700f1f6c..6add6fe0b 100644
--- a/src/wasm/wrt/ngx_wrt.h
+++ b/src/wasm/wrt/ngx_wrt.h
@@ -16,6 +16,7 @@ typedef struct ngx_wavm_instance_s  ngx_wavm_instance_t;
 typedef struct {
     const ngx_str_t               *vm_name;
     const ngx_str_t               *runtime_name;
+    ngx_str_t                      cache_config;
     ngx_str_t                      compiler;
     ngx_flag_t                     backtraces;
     ngx_array_t                    flags;
diff --git a/src/wasm/wrt/ngx_wrt_wasmtime.c b/src/wasm/wrt/ngx_wrt_wasmtime.c
index f42ee05fd..2ed0f1c2d 100644
--- a/src/wasm/wrt/ngx_wrt_wasmtime.c
+++ b/src/wasm/wrt/ngx_wrt_wasmtime.c
@@ -8,8 +8,9 @@
 #include <ngx_wasi.h>
 
 
-#define NGX_WRT_WASMTIME_STACK_NARGS  10
-#define NGX_WRT_WASMTIME_STACK_NRETS  10
+#define NGX_WRT_WASMTIME_STACK_NARGS     10
+#define NGX_WRT_WASMTIME_STACK_NRETS     10
+#define NGX_WRT_WASMTIME_CONFIG_ERR_LEN  255
 
 
 typedef void (*wasmtime_config_set_int_pt)(wasm_config_t *config,
@@ -17,6 +18,10 @@ typedef void (*wasmtime_config_set_int_pt)(wasm_config_t *config,
 typedef void (*wasmtime_config_set_bool_pt)(wasm_config_t *config, bool value);
 
 
+static u_char * ngx_wasmtime_log_handler(ngx_wrt_res_t *res, u_char *buf,
+    size_t len);
+
+
 static ngx_int_t
 size_flag_handler(wasm_config_t *config, ngx_str_t *name, ngx_str_t *value,
     ngx_log_t *log, void *wrt_setter)
@@ -129,7 +134,10 @@ profiler_flag_handler(wasm_config_t *config, ngx_str_t *name, ngx_str_t *value,
 static wasm_config_t *
 ngx_wasmtime_init_conf(ngx_wavm_conf_t *conf, ngx_log_t *log)
 {
-    wasm_config_t  *config;
+    wasm_config_t     *config;
+    char              *pathname;
+    u_char            *errmsg;
+    wasmtime_error_t  *err;
 #if 0
     wasm_name_t        msg;
     wasmtime_error_t  *err = NULL;
@@ -160,6 +168,39 @@ ngx_wasmtime_init_conf(ngx_wavm_conf_t *conf, ngx_log_t *log)
     wasmtime_config_static_memory_maximum_size_set(config, 0);
 #endif
 
+    if (conf->cache_config.len) {
+        ngx_wavm_log_error(NGX_LOG_INFO, log, NULL,
+                           "setting wasmtime cache config file: \"%V\"",
+                           &conf->cache_config);
+
+        pathname = ngx_calloc(conf->cache_config.len + 1, log);
+        if (pathname == NULL) {
+            goto error;
+        }
+
+        ngx_memcpy(pathname, conf->cache_config.data, conf->cache_config.len);
+
+        err = wasmtime_config_cache_config_load(config, pathname);
+
+        ngx_free(pathname);
+
+        if (err) {
+            errmsg = ngx_calloc(NGX_WRT_WASMTIME_CONFIG_ERR_LEN + 1, log);
+            if (errmsg == NULL) {
+                goto error;
+            }
+
+            ngx_wasmtime_log_handler((ngx_wrt_res_t *) err, errmsg,
+                                     NGX_WRT_WASMTIME_CONFIG_ERR_LEN);
+
+            ngx_log_error(NGX_LOG_EMERG, log, 0,
+                          "failed configuring wasmtime cache; %s",
+                          errmsg);
+
+            goto error;
+        }
+    }
+
     if (conf->compiler.len) {
         if (ngx_str_eq(conf->compiler.data, conf->compiler.len,
                        "auto", -1))
diff --git a/t/01-wasm/directives/008-flag_directive_wasmtime.t b/t/01-wasm/directives/008-flag_directive_wasmtime.t
index 6e69076b6..9fb5c3250 100644
--- a/t/01-wasm/directives/008-flag_directive_wasmtime.t
+++ b/t/01-wasm/directives/008-flag_directive_wasmtime.t
@@ -87,7 +87,111 @@ qr/setting flag: "debug_info=off"/
 
 
 
-=== TEST 5: flag directive - wasmtime - consume_fuel - on
+=== TEST 5: flag directive - wasmtime - cache_config_load - missing file
+--- skip_eval: 4: $::nginxV !~ m/wasmtime/
+--- main_config
+    wasm {
+        wasmtime {
+            cache_config missing_file;
+        }
+    }
+--- error_log eval
+qr/\[emerg\] .*? failed configuring wasmtime cache; failed to read config file: missing_file/
+--- no_error_log
+[error]
+[crit]
+--- must_die
+
+
+
+=== TEST 6: flag directive - wasmtime - cache_config_load - bad file
+--- skip_eval: 4: $::nginxV !~ m/wasmtime/
+--- user_files
+>>> wasmtime_config.toml
+invalid contents
+--- main_config
+    wasm {
+        wasmtime {
+            cache_config $TEST_NGINX_HTML_DIR/wasmtime_config.toml;
+        }
+    }
+--- error_log eval
+qr@\[emerg\] .*? failed configuring wasmtime cache; failed to parse config file: .*/wasmtime_config.toml@
+--- no_error_log
+[error]
+[crit]
+--- must_die
+
+
+
+=== TEST 7: flag directive - wasmtime - cache_config_load - good file, cache disabled
+--- skip_eval: 4: $::nginxV !~ m/wasmtime/
+--- user_files
+>>> wasmtime_config.toml
+[cache]
+enabled = false
+--- main_config eval
+qq{
+    wasm {
+        module hostcalls $t::TestWasmX::crates/hostcalls.wasm;
+
+        wasmtime {
+            cache_config $ENV{TEST_NGINX_HTML_DIR}/wasmtime_config.toml;
+        }
+    }
+}
+--- config
+    location /t {
+        proxy_wasm hostcalls 'test=/t/set_request_header \
+                              value=Hello:wasm';
+        proxy_wasm hostcalls 'test=/t/echo/headers';
+    }
+--- response_body
+Host: localhost
+Connection: close
+Hello: wasm
+--- error_log eval
+qr@setting wasmtime cache config file: ".*/wasmtime_config.toml"@
+--- no_error_log
+[error]
+
+
+
+=== TEST 8: flag directive - wasmtime - cache_config_load - good file, cache enabled
+--- skip_eval: 4: $::nginxV !~ m/wasmtime/
+--- user_files
+>>> wasmtime_config.toml
+[cache]
+enabled = true
+directory = "/tmp/ngx_wasm_module/cache/wasmtime"
+--- main_config eval
+qq{
+    wasm {
+        module hostcalls $t::TestWasmX::crates/hostcalls.wasm;
+
+        wasmtime {
+            cache_config $ENV{TEST_NGINX_HTML_DIR}/wasmtime_config.toml;
+        }
+    }
+}
+--- config
+    location /t {
+        proxy_wasm hostcalls 'test=/t/set_request_header \
+                              value=Hello:wasm';
+        proxy_wasm hostcalls 'test=/t/echo/headers';
+    }
+--- response_body
+Host: localhost
+Connection: close
+Hello: wasm
+--- error_log eval
+qr@setting wasmtime cache config file: ".*/wasmtime_config.toml"@
+--- no_error_log
+[error]
+
+
+
+=== TEST 9: flag directive - wasmtime - consume_fuel - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -103,7 +207,7 @@ qr/setting flag: "consume_fuel=on"/
 
 
 
-=== TEST 6: flag directive - wasmtime - consume_fuel - off
+=== TEST 10: flag directive - wasmtime - consume_fuel - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -119,7 +223,7 @@ qr/setting flag: "consume_fuel=off"/
 
 
 
-=== TEST 7: flag directive - wasmtime - epoch_interruption - on
+=== TEST 11: flag directive - wasmtime - epoch_interruption - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -135,7 +239,7 @@ qr/setting flag: "epoch_interruption=on"/
 
 
 
-=== TEST 8: flag directive - wasmtime - epoch_interruption - off
+=== TEST 12: flag directive - wasmtime - epoch_interruption - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -151,7 +255,7 @@ qr/setting flag: "epoch_interruption=off"/
 
 
 
-=== TEST 9: flag directive - wasmtime - max_wasm_stack
+=== TEST 13: flag directive - wasmtime - max_wasm_stack
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -167,7 +271,7 @@ qr/setting flag: "max_wasm_stack=2m"/
 
 
 
-=== TEST 10: flag directive - wasmtime - wasm_threads - on
+=== TEST 14: flag directive - wasmtime - wasm_threads - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -183,7 +287,7 @@ qr/setting flag: "wasm_threads=on"/
 
 
 
-=== TEST 11: flag directive - wasmtime - wasm_threads - off
+=== TEST 15: flag directive - wasmtime - wasm_threads - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -199,7 +303,7 @@ qr/setting flag: "wasm_threads=off"/
 
 
 
-=== TEST 12: flag directive - wasmtime - wasm_reference_types - on
+=== TEST 16: flag directive - wasmtime - wasm_reference_types - on
 --- SKIP: Unsupported (hard-coded)
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
@@ -216,7 +320,7 @@ qr/setting flag: "wasm_reference_types=on"/
 
 
 
-=== TEST 13: flag directive - wasmtime - wasm_reference_types - off
+=== TEST 17: flag directive - wasmtime - wasm_reference_types - off
 --- SKIP: Unsupported (hard-coded)
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
@@ -233,7 +337,7 @@ qr/setting flag: "wasm_reference_types=off"/
 
 
 
-=== TEST 14: flag directive - wasmtime - wasm_simd - on
+=== TEST 18: flag directive - wasmtime - wasm_simd - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -249,7 +353,7 @@ qr/setting flag: "wasm_simd=on"/
 
 
 
-=== TEST 15: flag directive - wasmtime - wasm_simd - off
+=== TEST 19: flag directive - wasmtime - wasm_simd - off
 Disable both flags to avoid:
     "cannot disable the simd proposal but enable the relaxed simd proposal"
 Shown twice in logs for master+single procs
@@ -273,7 +377,7 @@ setting flag: "wasm_relaxed_simd=off"
 
 
 
-=== TEST 16: flag directive - wasmtime - wasm_bulk_memory - on
+=== TEST 20: flag directive - wasmtime - wasm_bulk_memory - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -289,7 +393,7 @@ qr/setting flag: "wasm_bulk_memory=on"/
 
 
 
-=== TEST 17: flag directive - wasmtime - wasm_bulk_memory - off
+=== TEST 21: flag directive - wasmtime - wasm_bulk_memory - off
 Disable all three flags as 'bulk_memory' requires 'threads' and 'reference_types'
 Shown twice in logs for master+single procs
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
@@ -315,7 +419,7 @@ setting flag: "wasm_reference_types=off"
 
 
 
-=== TEST 18: flag directive - wasmtime - wasm_multi_value - on
+=== TEST 22: flag directive - wasmtime - wasm_multi_value - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -331,7 +435,7 @@ qr/setting flag: "wasm_multi_value=on"/
 
 
 
-=== TEST 19: flag directive - wasmtime - wasm_multi_value - off
+=== TEST 23: flag directive - wasmtime - wasm_multi_value - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -347,7 +451,7 @@ qr/setting flag: "wasm_multi_value=off"/
 
 
 
-=== TEST 20: flag directive - wasmtime - wasm_multi_memory - on
+=== TEST 24: flag directive - wasmtime - wasm_multi_memory - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -363,7 +467,7 @@ qr/setting flag: "wasm_multi_memory=on"/
 
 
 
-=== TEST 21: flag directive - wasmtime - wasm_multi_memory - off
+=== TEST 25: flag directive - wasmtime - wasm_multi_memory - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -379,7 +483,7 @@ qr/setting flag: "wasm_multi_memory=off"/
 
 
 
-=== TEST 22: flag directive - wasmtime - wasm_memory64 - on
+=== TEST 26: flag directive - wasmtime - wasm_memory64 - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -395,7 +499,7 @@ qr/setting flag: "wasm_memory64=on"/
 
 
 
-=== TEST 23: flag directive - wasmtime - wasm_memory64 - off
+=== TEST 27: flag directive - wasmtime - wasm_memory64 - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -411,7 +515,7 @@ qr/setting flag: "wasm_memory64=off"/
 
 
 
-=== TEST 24: flag directive - wasmtime - strategy - auto
+=== TEST 28: flag directive - wasmtime - strategy - auto
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -427,7 +531,7 @@ qr/setting flag: "strategy=auto"/
 
 
 
-=== TEST 25: flag directive - wasmtime - strategy - cranelift
+=== TEST 29: flag directive - wasmtime - strategy - cranelift
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -443,7 +547,7 @@ qr/setting flag: "strategy=cranelift"/
 
 
 
-=== TEST 26: flag directive - wasmtime - parallel_compilation - on
+=== TEST 30: flag directive - wasmtime - parallel_compilation - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -459,7 +563,7 @@ qr/setting flag: "parallel_compilation=on"/
 
 
 
-=== TEST 27: flag directive - wasmtime - parallel_compilation - off
+=== TEST 31: flag directive - wasmtime - parallel_compilation - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -475,7 +579,7 @@ qr/setting flag: "parallel_compilation=off"/
 
 
 
-=== TEST 28: flag directive - wasmtime - cranelift_debug_verifier - on
+=== TEST 32: flag directive - wasmtime - cranelift_debug_verifier - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -491,7 +595,7 @@ qr/setting flag: "cranelift_debug_verifier=on"/
 
 
 
-=== TEST 29: flag directive - wasmtime - cranelift_debug_verifier - off
+=== TEST 33: flag directive - wasmtime - cranelift_debug_verifier - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -507,7 +611,7 @@ qr/setting flag: "cranelift_debug_verifier=off"/
 
 
 
-=== TEST 30: flag directive - wasmtime - cranelift_nan_canonicalization - on
+=== TEST 34: flag directive - wasmtime - cranelift_nan_canonicalization - on
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -523,7 +627,7 @@ qr/setting flag: "cranelift_nan_canonicalization=on"/
 
 
 
-=== TEST 31: flag directive - wasmtime - cranelift_nan_canonicalization - off
+=== TEST 35: flag directive - wasmtime - cranelift_nan_canonicalization - off
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -539,7 +643,7 @@ qr/setting flag: "cranelift_nan_canonicalization=off"/
 
 
 
-=== TEST 32: flag directive - wasmtime - cranelift_opt_level - none
+=== TEST 36: flag directive - wasmtime - cranelift_opt_level - none
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -555,7 +659,7 @@ qr/setting flag: "cranelift_opt_level=none"/
 
 
 
-=== TEST 33: flag directive - wasmtime - cranelift_opt_level - speed
+=== TEST 37: flag directive - wasmtime - cranelift_opt_level - speed
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -571,7 +675,7 @@ qr/setting flag: "cranelift_opt_level=speed"/
 
 
 
-=== TEST 34: flag directive - wasmtime - cranelift_opt_level - speed_and_size
+=== TEST 38: flag directive - wasmtime - cranelift_opt_level - speed_and_size
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -587,7 +691,7 @@ qr/setting flag: "cranelift_opt_level=speed_and_size"/
 
 
 
-=== TEST 35: flag directive - wasmtime - profiler - none
+=== TEST 39: flag directive - wasmtime - profiler - none
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -603,7 +707,7 @@ qr/setting flag: "profiler=none"/
 
 
 
-=== TEST 36: flag directive - wasmtime - profiler - jitdump
+=== TEST 40: flag directive - wasmtime - profiler - jitdump
 Linux-only: jitdump support
 --- skip_eval: 4: ($::nginxV !~ m/wasmtime/ || $::osname !~ /linux/)
 --- main_config
@@ -620,7 +724,7 @@ qr/setting flag: "profiler=jitdump"/
 
 
 
-=== TEST 37: flag directive - wasmtime - profiler - vtune
+=== TEST 41: flag directive - wasmtime - profiler - vtune
 --- SKIP: vtune disabled at compile time in release builds
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
@@ -637,7 +741,7 @@ qr/setting flag: "profiler=vtune"/
 
 
 
-=== TEST 38: flag directive - wasmtime - profiler - perfmap
+=== TEST 42: flag directive - wasmtime - profiler - perfmap
 Linux-only: perfmap support
 --- skip_eval: 4: ($::nginxV !~ m/wasmtime/ || $::osname !~ /linux/)
 --- main_config
@@ -654,7 +758,7 @@ qr/setting flag: "profiler=perfmap"/
 
 
 
-=== TEST 39: flag directive - wasmtime - static_memory_maximum_size
+=== TEST 43: flag directive - wasmtime - static_memory_maximum_size
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -670,7 +774,7 @@ qr/setting flag: "static_memory_maximum_size=10m"/
 
 
 
-=== TEST 40: flag directive - wasmtime - static_memory_guard_size
+=== TEST 44: flag directive - wasmtime - static_memory_guard_size
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {
@@ -686,7 +790,7 @@ qr/setting flag: "static_memory_guard_size=4000m"/
 
 
 
-=== TEST 41: flag directive - wasmtime - dynamic_memory_guard_size
+=== TEST 45: flag directive - wasmtime - dynamic_memory_guard_size
 --- skip_eval: 4: $::nginxV !~ m/wasmtime/
 --- main_config
     wasm {