diff --git a/README.md b/README.md
index b772da4..ed9ab54 100644
--- a/README.md
+++ b/README.md
@@ -13,13 +13,13 @@ this notice are preserved. This file is offered as-is, without any warranty.
 
 ctlseqs - helper library for terminal control sequences
 
-# Description
+## About
 
 The ctlseqs library provides C API for manipulating terminal emulators with control sequences.
 
 ctlseqs is free software. you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 
-# Getting Started
+## Getting Started
 
 To install and use the library, see [INSTALL.md](INSTALL.md) for details.
 
diff --git a/src/ctlseqs.c b/src/ctlseqs.c
index 1d3a09c..f980f00 100644
--- a/src/ctlseqs.c
+++ b/src/ctlseqs.c
@@ -59,9 +59,13 @@
 #  define CTLSEQS_HOT
 #endif  // HAVE_FUNC_ATTRIBUTE_HOT
 
-#ifndef CTLSEQS_TRIE_INIT_SIZE
-#  define CTLSEQS_TRIE_INIT_SIZE 16
-#endif  // !CTLSEQS_TRIE_INIT_SIZE
+#ifndef CTLSEQS_TRIE_NODE_POOL_INIT_SIZE
+#  define CTLSEQS_TRIE_NODE_POOL_INIT_SIZE 16
+#endif  // !CTLSEQS_TRIE_NODE_POOL_INIT_SIZE
+
+#ifndef CTLSEQS_TRIE_NODE_POOL_MAX_NUM
+#  define CTLSEQS_TRIE_NODE_POOL_MAX_NUM 8
+#endif  // !CTLSEQS_TRIE_NODE_POOL_MAX_NUM
 
 #define CTLSEQS_VALUE_STR(stop_cond)    \
     for (cnt = 0; ; ++cnt) {            \
@@ -127,8 +131,9 @@ struct ctlseqs_match_ctx {
 
 struct ctlseqs_matcher {
     struct ctlseqs_trie_node  root;
-    struct ctlseqs_trie_node *node_pool;
-    size_t                    node_pool_size;
+    struct ctlseqs_trie_node *node_pools[CTLSEQS_TRIE_NODE_POOL_MAX_NUM];
+    size_t                    pool_idx;
+    size_t                    pool_size;
     struct ctlseqs_match_ctx *match_stack;
 };
 
@@ -384,24 +389,25 @@ ctlseqs_match(struct ctlseqs_reader *reader, struct ctlseqs_matcher const *match
 struct ctlseqs_matcher *
 ctlseqs_matcher_init()
 {
+    struct ctlseqs_trie_node *pool = malloc(sizeof(struct ctlseqs_trie_node) * CTLSEQS_TRIE_NODE_POOL_INIT_SIZE);
     struct ctlseqs_matcher *matcher = malloc(sizeof(struct ctlseqs_matcher));
-    if (CTLSEQS_LIKELY(matcher != NULL)) {
-        *matcher = (struct ctlseqs_matcher) { .node_pool_size = 0 };
+    if (CTLSEQS_UNLIKELY(pool == NULL || matcher == NULL)) {
+        free(pool);
+        free(matcher);
+        return NULL;
     }
+    *matcher = (struct ctlseqs_matcher) {
+        .node_pools = { pool },
+        .pool_size  = CTLSEQS_TRIE_NODE_POOL_INIT_SIZE
+    };
     return matcher;
 }
 
 int
 ctlseqs_matcher_config(struct ctlseqs_matcher *matcher, struct ctlseqs_matcher_options const *options)
 {
-    size_t node_pool_idx = 0, max_format_size = 0;
-    if (matcher->node_pool == NULL) {
-        matcher->node_pool_size = sizeof(struct ctlseqs_trie_node) * CTLSEQS_TRIE_INIT_SIZE;
-        matcher->node_pool = malloc(matcher->node_pool_size);
-        if (CTLSEQS_UNLIKELY(matcher->node_pool == NULL)) {
-            return CTLSEQS_NOMEM;
-        }
-    }
+    size_t node_idx = 0, max_format_size = 0;
+    struct ctlseqs_trie_node *node_pool = matcher->node_pools[matcher->pool_idx];
     matcher->root = (struct ctlseqs_trie_node) { .value = -1 };
     for (size_t i = 0; i < options->npatterns; ++i) {
         char const *pattern = options->patterns[i];
@@ -421,15 +427,19 @@ ctlseqs_matcher_config(struct ctlseqs_matcher *matcher, struct ctlseqs_matcher_o
             if (node != NULL) {
                 continue;
             }
-            if (CTLSEQS_UNLIKELY(++node_pool_idx >= matcher->node_pool_size)) {
-                struct ctlseqs_trie_node *new_pool = realloc(matcher->node_pool, matcher->node_pool_size * 2);
-                if (CTLSEQS_UNLIKELY(new_pool == NULL)) {
+            if (CTLSEQS_UNLIKELY(++node_idx >= matcher->pool_size)) {
+                if (CTLSEQS_UNLIKELY(++matcher->pool_idx >= CTLSEQS_TRIE_NODE_POOL_MAX_NUM)) {
                     return CTLSEQS_NOMEM;
                 }
-                matcher->node_pool = new_pool;
-                matcher->node_pool_size *= 2;
+                node_pool = malloc(sizeof(struct ctlseqs_trie_node) * matcher->pool_size * 2);
+                if (CTLSEQS_UNLIKELY(node_pool == NULL)) {
+                    return CTLSEQS_NOMEM;
+                }
+                node_idx = 0;
+                matcher->node_pools[matcher->pool_idx] = node_pool;
+                matcher->pool_size *= 2;
             }
-            old_node->children[ch] = node = &matcher->node_pool[node_pool_idx];
+            old_node->children[ch] = node = node_pool + node_idx;
             *node = (struct ctlseqs_trie_node) {
                 .value = -1,  // Value -1 indicates that there's no match on current node.
                 .placeholder = ch < ctlseqs_ph_begin || ch >= ctlseqs_ph_end ? 0 : ch,
@@ -458,7 +468,10 @@ CTLSEQS_COLD void
 ctlseqs_matcher_free(struct ctlseqs_matcher *matcher)
 {
     if (matcher != NULL) {
-        free(matcher->node_pool);
+        for (size_t idx = 0; idx <= matcher->pool_idx; ++idx) {
+            free(matcher->node_pools[idx]);
+        }
+        free(matcher->match_stack);
         free(matcher);
     }
 }
diff --git a/tests/tcsgrep.c b/tests/tcsgrep.c
index 52f8448..87c538e 100644
--- a/tests/tcsgrep.c
+++ b/tests/tcsgrep.c
@@ -440,6 +440,9 @@ main(int argc, char **argv)
     }
 
     terminate:
+    free(patterns);
+    ctlseqs_matcher_free(matcher);
+    ctlseqs_reader_free(reader);
     tcsetattr(STDIN_FILENO, TCSANOW, &old_termios);
     return status;
 }