diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc0850b23c..6b9ca7b41d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -653,7 +653,7 @@ if(WITH_OPTIM)
             check_acle_compiler_flag()
             if(HAVE_ACLE_FLAG)
                 add_definitions(-DARM_ACLE)
-                set(ACLE_SRCS ${ARCHDIR}/crc32_acle.c ${ARCHDIR}/insert_string_acle.c)
+                set(ACLE_SRCS ${ARCHDIR}/crc32_acle.c)
                 set_property(SOURCE ${ACLE_SRCS} PROPERTY COMPILE_FLAGS "${ACLEFLAG} ${NOLTOFLAG}")
                 list(APPEND ZLIB_ARCH_SRCS ${ACLE_SRCS})
                 add_feature_info(ACLE_CRC 1 "Support ACLE optimized CRC hash generation, using \"${ACLEFLAG}\"")
@@ -857,8 +857,8 @@ if(WITH_OPTIM)
             check_sse42_intrinsics()
             if(HAVE_SSE42_INTRIN AND WITH_SSSE3)
                 add_definitions(-DX86_SSE42)
-                set(SSE42_SRCS ${ARCHDIR}/adler32_sse42.c ${ARCHDIR}/insert_string_sse42.c)
-                add_feature_info(SSE42_CRC 1 "Support SSE4.2 optimized CRC hash generation, using \"${SSE42FLAG}\"")
+                set(SSE42_SRCS ${ARCHDIR}/adler32_sse42.c)
+                add_feature_info(SSE42_CRC 1 "Support SSE4.2 optimized adler32 hash generation, using \"${SSE42FLAG}\"")
                 list(APPEND ZLIB_ARCH_SRCS ${SSE42_SRCS})
                 set_property(SOURCE ${SSE42_SRCS} PROPERTY COMPILE_FLAGS "${SSE42FLAG} ${NOLTOFLAG}")
             else()
@@ -1034,7 +1034,6 @@ set(ZLIB_SRCS
     arch/generic/compare256_c.c
     arch/generic/crc32_braid_c.c
     arch/generic/crc32_fold_c.c
-    arch/generic/insert_string_c.c
     arch/generic/slide_hash_c.c
     adler32.c
     compress.c
@@ -1053,6 +1052,7 @@ set(ZLIB_SRCS
     infback.c
     inflate.c
     inftrees.c
+    insert_string.c
     insert_string_roll.c
     trees.c
     uncompr.c
diff --git a/Makefile.in b/Makefile.in
index a1c3290ab4..df8105f27c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -80,7 +80,6 @@ OBJZ = \
 	arch/generic/compare256_c.o \
 	arch/generic/crc32_braid_c.o \
 	arch/generic/crc32_fold_c.o \
-	arch/generic/insert_string_c.o \
 	arch/generic/slide_hash_c.o \
 	adler32.o \
 	compress.o \
@@ -99,6 +98,7 @@ OBJZ = \
 	infback.o \
 	inflate.o \
 	inftrees.o \
+	insert_string.o \
 	insert_string_roll.o \
 	trees.o \
 	uncompr.o \
@@ -120,7 +120,6 @@ PIC_OBJZ = \
 	arch/generic/compare256_c.lo \
 	arch/generic/crc32_braid_c.lo \
 	arch/generic/crc32_fold_c.lo \
-	arch/generic/insert_string_c.lo \
 	arch/generic/slide_hash_c.lo \
 	adler32.lo \
 	compress.lo \
@@ -139,6 +138,7 @@ PIC_OBJZ = \
 	infback.lo \
 	inflate.lo \
 	inftrees.lo \
+	insert_string.lo \
 	insert_string_roll.lo \
 	trees.lo \
 	uncompr.lo \
diff --git a/README.md b/README.md
index 4f9fe09c69..123a4bbc39 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,6 @@ Features
 * Support for CPU intrinsics when available
   * Adler32 implementation using SSSE3, AVX2, AVX512, AVX512-VNNI, Neon, VMX & VSX
   * CRC32-B implementation using PCLMULQDQ, VPCLMULQDQ, ACLE, & IBM Z
-  * Hash table implementation using CRC32-C intrinsics on x86 and ARM
   * Slide hash implementations using SSE2, AVX2, ARMv6, Neon, VMX & VSX
   * Compare256 implementations using SSE2, AVX2, Neon, POWER9 & RVV
   * Inflate chunk copying using SSE2, SSSE3, AVX, Neon & VSX
diff --git a/arch/arm/Makefile.in b/arch/arm/Makefile.in
index 9d05b00b54..b6f0aaf211 100644
--- a/arch/arm/Makefile.in
+++ b/arch/arm/Makefile.in
@@ -25,7 +25,6 @@ all: \
 	crc32_acle.o crc32_acle.lo \
 	slide_hash_neon.o slide_hash_neon.lo \
 	slide_hash_armv6.o slide_hash_armv6.lo \
-	insert_string_acle.o insert_string_acle.lo
 
 adler32_neon.o:
 	$(CC) $(CFLAGS) $(NEONFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/adler32_neon.c
@@ -69,12 +68,6 @@ slide_hash_armv6.o:
 slide_hash_armv6.lo:
 	$(CC) $(SFLAGS) $(ARMV6FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_armv6.c
 
-insert_string_acle.o:
-	$(CC) $(CFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
-
-insert_string_acle.lo:
-	$(CC) $(SFLAGS) $(ACLEFLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_acle.c
-
 mostlyclean: clean
 clean:
 	rm -f *.o *.lo *~
diff --git a/arch/arm/arm_functions.h b/arch/arm/arm_functions.h
index 711a9f627b..95a9a7e04e 100644
--- a/arch/arm/arm_functions.h
+++ b/arch/arm/arm_functions.h
@@ -22,10 +22,6 @@ void inflate_fast_neon(PREFIX3(stream) *strm, uint32_t start);
 
 #ifdef ARM_ACLE
 uint32_t crc32_acle(uint32_t crc, const uint8_t *buf, size_t len);
-
-void insert_string_acle(deflate_state *const s, const uint32_t str, uint32_t count);
-Pos quick_insert_string_acle(deflate_state *const s, const uint32_t str);
-uint32_t update_hash_acle(uint32_t h, uint32_t val);
 #endif
 
 #ifdef ARM_SIMD
diff --git a/arch/arm/insert_string_acle.c b/arch/arm/insert_string_acle.c
deleted file mode 100644
index 70edffe739..0000000000
--- a/arch/arm/insert_string_acle.c
+++ /dev/null
@@ -1,24 +0,0 @@
-/* insert_string_acle.c -- insert_string integer hash variant using ACLE's CRC instructions
- *
- * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- */
-
-#ifdef ARM_ACLE
-#include "acle_intrins.h"
-#include "zbuild.h"
-#include "deflate.h"
-
-#define HASH_CALC(s, h, val) \
-    h = __crc32w(0, val)
-
-#define HASH_CALC_VAR       h
-#define HASH_CALC_VAR_INIT  uint32_t h = 0
-
-#define UPDATE_HASH         Z_TARGET_CRC update_hash_acle
-#define INSERT_STRING       Z_TARGET_CRC insert_string_acle
-#define QUICK_INSERT_STRING Z_TARGET_CRC quick_insert_string_acle
-
-#include "insert_string_tpl.h"
-#endif
diff --git a/arch/generic/Makefile.in b/arch/generic/Makefile.in
index 412b41a5ee..32c8242d02 100644
--- a/arch/generic/Makefile.in
+++ b/arch/generic/Makefile.in
@@ -19,7 +19,6 @@ all: \
  compare256_c.o compare256_c.lo \
  crc32_braid_c.o crc32_braid_c.lo \
  crc32_fold_c.o crc32_fold_c.lo \
- insert_string_c.o insert_string_c.lo \
  slide_hash_c.o slide_hash_c.lo
 
 
@@ -59,12 +58,6 @@ crc32_fold_c.o: $(SRCDIR)/crc32_fold_c.c  $(SRCTOP)/zbuild.h $(SRCTOP)/functable
 crc32_fold_c.lo: $(SRCDIR)/crc32_fold_c.c  $(SRCTOP)/zbuild.h $(SRCTOP)/functable.h
 	$(CC) $(SFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_fold_c.c
 
-insert_string_c.o: $(SRCDIR)/insert_string_c.c  $(SRCTOP)/zbuild.h $(SRCTOP)/deflate.h $(SRCTOP)/insert_string_tpl.h
-	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_c.c
-
-insert_string_c.lo: $(SRCDIR)/insert_string_c.c  $(SRCTOP)/zbuild.h $(SRCTOP)/deflate.h $(SRCTOP)/insert_string_tpl.h
-	$(CC) $(SFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_c.c
-
 slide_hash_c.o: $(SRCDIR)/slide_hash_c.c  $(SRCTOP)/zbuild.h $(SRCTOP)/deflate.h
 	$(CC) $(CFLAGS) $(INCLUDES) -c -o $@ $(SRCDIR)/slide_hash_c.c
 
diff --git a/arch/generic/generic_functions.h b/arch/generic/generic_functions.h
index debc4b5845..02b2cdda08 100644
--- a/arch/generic/generic_functions.h
+++ b/arch/generic/generic_functions.h
@@ -40,10 +40,7 @@ uint32_t compare256_unaligned_16(const uint8_t *src0, const uint8_t *src1);
 
 typedef void (*slide_hash_func)(deflate_state *s);
 
-void     insert_string_c(deflate_state *const s, const uint32_t str, uint32_t count);
-Pos      quick_insert_string_c(deflate_state *const s, const uint32_t str);
 void     slide_hash_c(deflate_state *s);
-uint32_t update_hash_c(deflate_state *const s, uint32_t h, uint32_t val);
 
 uint32_t longest_match_c(deflate_state *const s, Pos cur_match);
 #  if defined(UNALIGNED_OK) && BYTE_ORDER == LITTLE_ENDIAN
diff --git a/arch/x86/Makefile.in b/arch/x86/Makefile.in
index f84fe6e6be..c13cd179c0 100644
--- a/arch/x86/Makefile.in
+++ b/arch/x86/Makefile.in
@@ -35,7 +35,6 @@ all: \
 	chunkset_ssse3.o chunkset_ssse3.lo \
 	compare256_avx2.o compare256_avx2.lo \
 	compare256_sse2.o compare256_sse2.lo \
-	insert_string_sse42.o insert_string_sse42.lo \
 	crc32_pclmulqdq.o crc32_pclmulqdq.lo \
 	crc32_vpclmulqdq.o crc32_vpclmulqdq.lo \
 	slide_hash_avx2.o slide_hash_avx2.lo \
@@ -77,12 +76,6 @@ compare256_sse2.o:
 compare256_sse2.lo:
 	$(CC) $(SFLAGS) $(SSE2FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/compare256_sse2.c
 
-insert_string_sse42.o:
-	$(CC) $(CFLAGS) $(SSE42FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse42.c
-
-insert_string_sse42.lo:
-	$(CC) $(SFLAGS) $(SSE42FLAG) $(NOLTOFLAG) -DPIC $(INCLUDES) -c -o $@ $(SRCDIR)/insert_string_sse42.c
-
 crc32_pclmulqdq.o:
 	$(CC) $(CFLAGS) $(PCLMULFLAG) $(SSE42FLAG) $(NOLTOFLAG) $(INCLUDES) -c -o $@ $(SRCDIR)/crc32_pclmulqdq.c
 
diff --git a/arch/x86/insert_string_sse42.c b/arch/x86/insert_string_sse42.c
deleted file mode 100644
index 9871661ed9..0000000000
--- a/arch/x86/insert_string_sse42.c
+++ /dev/null
@@ -1,24 +0,0 @@
-/* insert_string_sse42.c -- insert_string integer hash variant using SSE4.2's CRC instructions
- *
- * Copyright (C) 1995-2024 Jean-loup Gailly and Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
- *
- */
-
-#ifdef X86_SSE42
-#include "zbuild.h"
-#include <nmmintrin.h>
-#include "deflate.h"
-
-#define HASH_CALC(s, h, val)\
-    h = _mm_crc32_u32(h, val)
-
-#define HASH_CALC_VAR       h
-#define HASH_CALC_VAR_INIT  uint32_t h = 0
-
-#define UPDATE_HASH         update_hash_sse42
-#define INSERT_STRING       insert_string_sse42
-#define QUICK_INSERT_STRING quick_insert_string_sse42
-
-#include "insert_string_tpl.h"
-#endif
diff --git a/arch/x86/x86_functions.h b/arch/x86/x86_functions.h
index a93a44b101..55ec4acc91 100644
--- a/arch/x86/x86_functions.h
+++ b/arch/x86/x86_functions.h
@@ -27,9 +27,6 @@ void inflate_fast_ssse3(PREFIX3(stream) *strm, uint32_t start);
 
 #ifdef X86_SSE42
 uint32_t adler32_fold_copy_sse42(uint32_t adler, uint8_t *dst, const uint8_t *src, size_t len);
-void insert_string_sse42(deflate_state *const s, const uint32_t str, uint32_t count);
-Pos quick_insert_string_sse42(deflate_state *const s, const uint32_t str);
-uint32_t update_hash_sse42(uint32_t h, uint32_t val);
 #endif
 
 #ifdef X86_AVX2
diff --git a/configure b/configure
index 566cdb348a..81e97c416a 100755
--- a/configure
+++ b/configure
@@ -1503,8 +1503,8 @@ case "${ARCH}" in
             if test ${HAVE_SSE42_INTRIN} -eq 1; then
                 CFLAGS="${CFLAGS} -DX86_SSE42"
                 SFLAGS="${SFLAGS} -DX86_SSE42"
-                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_sse42.o insert_string_sse42.o"
-                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_sse42.lo insert_string_sse42.lo"
+                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_sse42.o"
+                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_sse42.lo"
             fi
 
             check_pclmulqdq_intrinsics
@@ -1695,8 +1695,8 @@ EOF
                     CFLAGS="${CFLAGS} -DARM_ACLE"
                     SFLAGS="${SFLAGS} -DARM_ACLE"
 
-                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_acle.o insert_string_acle.o"
-                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_acle.lo insert_string_acle.lo"
+                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_acle.o"
+                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_acle.lo"
                 fi
             fi
 
diff --git a/deflate.c b/deflate.c
index 110830ef28..75ebd55b3a 100644
--- a/deflate.c
+++ b/deflate.c
@@ -120,10 +120,6 @@ static void lm_set_level         (deflate_state *s, int level);
 static void lm_init              (deflate_state *s);
 Z_INTERNAL unsigned read_buf  (PREFIX3(stream) *strm, unsigned char *buf, unsigned size);
 
-extern uint32_t update_hash_roll        (uint32_t h, uint32_t val);
-extern void     insert_string_roll      (deflate_state *const s, uint32_t str, uint32_t count);
-extern Pos      quick_insert_string_roll(deflate_state *const s, uint32_t str);
-
 /* ===========================================================================
  * Local data
  */
@@ -1144,9 +1140,9 @@ static void lm_set_level(deflate_state *s, int level) {
         s->insert_string = &insert_string_roll;
         s->quick_insert_string = &quick_insert_string_roll;
     } else {
-        s->update_hash = functable.update_hash;
-        s->insert_string = functable.insert_string;
-        s->quick_insert_string = functable.quick_insert_string;
+        s->update_hash = update_hash;
+        s->insert_string = insert_string;
+        s->quick_insert_string = quick_insert_string;
     }
 
     s->level = level;
diff --git a/deflate.h b/deflate.h
index 498b161b56..a6492031e1 100644
--- a/deflate.h
+++ b/deflate.h
@@ -117,6 +117,14 @@ typedef uint32_t (* update_hash_cb)        (uint32_t h, uint32_t val);
 typedef void     (* insert_string_cb)      (deflate_state *const s, uint32_t str, uint32_t count);
 typedef Pos      (* quick_insert_string_cb)(deflate_state *const s, uint32_t str);
 
+uint32_t update_hash             (uint32_t h, uint32_t val);
+void     insert_string           (deflate_state *const s, uint32_t str, uint32_t count);
+Pos      quick_insert_string     (deflate_state *const s, uint32_t str);
+
+uint32_t update_hash_roll        (uint32_t h, uint32_t val);
+void     insert_string_roll      (deflate_state *const s, uint32_t str, uint32_t count);
+Pos      quick_insert_string_roll(deflate_state *const s, uint32_t str);
+
 struct ALIGNED_(16) internal_state {
     PREFIX3(stream)      *strm;            /* pointer back to this zlib stream */
     unsigned char        *pending_buf;     /* output still pending */
diff --git a/deflate_fast.c b/deflate_fast.c
index 951bda157c..11fa4dc760 100644
--- a/deflate_fast.c
+++ b/deflate_fast.c
@@ -41,7 +41,7 @@ Z_INTERNAL block_state deflate_fast(deflate_state *s, int flush) {
          * dictionary, and set hash_head to the head of the hash chain:
          */
         if (s->lookahead >= WANT_MIN_MATCH) {
-            hash_head = functable.quick_insert_string(s, s->strstart);
+            hash_head = quick_insert_string(s, s->strstart);
             dist = (int64_t)s->strstart - hash_head;
 
             /* Find the longest match, discarding those <= prev_length.
@@ -71,11 +71,11 @@ Z_INTERNAL block_state deflate_fast(deflate_state *s, int flush) {
                 match_len--; /* string at strstart already in table */
                 s->strstart++;
 
-                functable.insert_string(s, s->strstart, match_len);
+                insert_string(s, s->strstart, match_len);
                 s->strstart += match_len;
             } else {
                 s->strstart += match_len;
-                functable.quick_insert_string(s, s->strstart + 2 - STD_MIN_MATCH);
+                quick_insert_string(s, s->strstart + 2 - STD_MIN_MATCH);
 
                 /* If lookahead < STD_MIN_MATCH, ins_h is garbage, but it does not
                  * matter since it will be recomputed at next deflate call.
diff --git a/deflate_medium.c b/deflate_medium.c
index 47796e3221..d2262d99ae 100644
--- a/deflate_medium.c
+++ b/deflate_medium.c
@@ -52,9 +52,9 @@ static void insert_match(deflate_state *s, struct match match) {
         if (UNLIKELY(match.match_length > 0)) {
             if (match.strstart >= match.orgstart) {
                 if (match.strstart + match.match_length - 1 >= match.orgstart) {
-                    functable.insert_string(s, match.strstart, match.match_length);
+                    insert_string(s, match.strstart, match.match_length);
                 } else {
-                    functable.insert_string(s, match.strstart, match.orgstart - match.strstart + 1);
+                    insert_string(s, match.strstart, match.orgstart - match.strstart + 1);
                 }
                 match.strstart += match.match_length;
                 match.match_length = 0;
@@ -72,12 +72,12 @@ static void insert_match(deflate_state *s, struct match match) {
 
         if (LIKELY(match.strstart >= match.orgstart)) {
             if (LIKELY(match.strstart + match.match_length - 1 >= match.orgstart)) {
-                functable.insert_string(s, match.strstart, match.match_length);
+                insert_string(s, match.strstart, match.match_length);
             } else {
-                functable.insert_string(s, match.strstart, match.orgstart - match.strstart + 1);
+                insert_string(s, match.strstart, match.orgstart - match.strstart + 1);
             }
         } else if (match.orgstart < match.strstart + match.match_length) {
-            functable.insert_string(s, match.orgstart, match.strstart + match.match_length - match.orgstart);
+            insert_string(s, match.orgstart, match.strstart + match.match_length - match.orgstart);
         }
         match.strstart += match.match_length;
         match.match_length = 0;
@@ -86,7 +86,7 @@ static void insert_match(deflate_state *s, struct match match) {
         match.match_length = 0;
 
         if (match.strstart >= (STD_MIN_MATCH - 2))
-            functable.quick_insert_string(s, match.strstart + 2 - STD_MIN_MATCH);
+            quick_insert_string(s, match.strstart + 2 - STD_MIN_MATCH);
 
         /* If lookahead < WANT_MIN_MATCH, ins_h is garbage, but it does not
          * matter since it will be recomputed at next deflate call.
@@ -199,7 +199,7 @@ Z_INTERNAL block_state deflate_medium(deflate_state *s, int flush) {
         } else {
             hash_head = 0;
             if (s->lookahead >= WANT_MIN_MATCH) {
-                hash_head = functable.quick_insert_string(s, s->strstart);
+                hash_head = quick_insert_string(s, s->strstart);
             }
 
             current_match.strstart = (uint16_t)s->strstart;
@@ -235,7 +235,7 @@ Z_INTERNAL block_state deflate_medium(deflate_state *s, int flush) {
         /* now, look ahead one */
         if (LIKELY(!early_exit && s->lookahead > MIN_LOOKAHEAD && (uint32_t)(current_match.strstart + current_match.match_length) < (s->window_size - MIN_LOOKAHEAD))) {
             s->strstart = current_match.strstart + current_match.match_length;
-            hash_head = functable.quick_insert_string(s, s->strstart);
+            hash_head = quick_insert_string(s, s->strstart);
 
             next_match.strstart = (uint16_t)s->strstart;
             next_match.orgstart = next_match.strstart;
diff --git a/deflate_quick.c b/deflate_quick.c
index df5a17b9e6..b72bd12900 100644
--- a/deflate_quick.c
+++ b/deflate_quick.c
@@ -86,7 +86,7 @@ Z_INTERNAL block_state deflate_quick(deflate_state *s, int flush) {
         }
 
         if (LIKELY(s->lookahead >= WANT_MIN_MATCH)) {
-            hash_head = functable.quick_insert_string(s, s->strstart);
+            hash_head = quick_insert_string(s, s->strstart);
             dist = (int64_t)s->strstart - hash_head;
 
             if (dist <= MAX_DIST(s) && dist > 0) {
diff --git a/functable.c b/functable.c
index f54d7077ab..c9444c0454 100644
--- a/functable.c
+++ b/functable.c
@@ -58,10 +58,7 @@ static void init_functable(void) {
     ft.crc32_fold_final = &crc32_fold_final_c;
     ft.crc32_fold_reset = &crc32_fold_reset_c;
     ft.inflate_fast = &inflate_fast_c;
-    ft.insert_string = &insert_string_c;
-    ft.quick_insert_string = &quick_insert_string_c;
     ft.slide_hash = &slide_hash_c;
-    ft.update_hash = &update_hash_c;
     ft.longest_match = &longest_match_generic;
     ft.longest_match_slow = &longest_match_slow_generic;
     ft.compare256 = &compare256_generic;
@@ -97,9 +94,6 @@ static void init_functable(void) {
 #ifdef X86_SSE42
     if (cf.x86.has_sse42) {
         ft.adler32_fold_copy = &adler32_fold_copy_sse42;
-        ft.insert_string = &insert_string_sse42;
-        ft.quick_insert_string = &quick_insert_string_sse42;
-        ft.update_hash = &update_hash_sse42;
     }
 #endif
     // X86 - PCLMUL
@@ -183,9 +177,6 @@ static void init_functable(void) {
 #ifdef ARM_ACLE
     if (cf.arm.has_crc32) {
         ft.crc32 = &crc32_acle;
-        ft.insert_string = &insert_string_acle;
-        ft.quick_insert_string = &quick_insert_string_acle;
-        ft.update_hash = &update_hash_acle;
     }
 #endif
 
@@ -256,12 +247,9 @@ static void init_functable(void) {
     FUNCTABLE_ASSIGN(ft, crc32_fold_final);
     FUNCTABLE_ASSIGN(ft, crc32_fold_reset);
     FUNCTABLE_ASSIGN(ft, inflate_fast);
-    FUNCTABLE_ASSIGN(ft, insert_string);
     FUNCTABLE_ASSIGN(ft, longest_match);
     FUNCTABLE_ASSIGN(ft, longest_match_slow);
-    FUNCTABLE_ASSIGN(ft, quick_insert_string);
     FUNCTABLE_ASSIGN(ft, slide_hash);
-    FUNCTABLE_ASSIGN(ft, update_hash);
 
     // Memory barrier for weak memory order CPUs
     FUNCTABLE_BARRIER();
@@ -327,11 +315,6 @@ static void inflate_fast_stub(PREFIX3(stream) *strm, uint32_t start) {
     functable.inflate_fast(strm, start);
 }
 
-static void insert_string_stub(deflate_state* const s, uint32_t str, uint32_t count) {
-    init_functable();
-    functable.insert_string(s, str, count);
-}
-
 static uint32_t longest_match_stub(deflate_state* const s, Pos cur_match) {
     init_functable();
     return functable.longest_match(s, cur_match);
@@ -342,21 +325,11 @@ static uint32_t longest_match_slow_stub(deflate_state* const s, Pos cur_match) {
     return functable.longest_match_slow(s, cur_match);
 }
 
-static Pos quick_insert_string_stub(deflate_state* const s, const uint32_t str) {
-    init_functable();
-    return functable.quick_insert_string(s, str);
-}
-
 static void slide_hash_stub(deflate_state* s) {
     init_functable();
     functable.slide_hash(s);
 }
 
-static uint32_t update_hash_stub(uint32_t h, uint32_t val) {
-    init_functable();
-    return functable.update_hash(h, val);
-}
-
 /* functable init */
 Z_INTERNAL struct functable_s functable = {
     force_init_stub,
@@ -371,10 +344,7 @@ Z_INTERNAL struct functable_s functable = {
     crc32_fold_final_stub,
     crc32_fold_reset_stub,
     inflate_fast_stub,
-    insert_string_stub,
     longest_match_stub,
     longest_match_slow_stub,
-    quick_insert_string_stub,
     slide_hash_stub,
-    update_hash_stub
 };
diff --git a/functable.h b/functable.h
index 201d45f991..7f6334a0c6 100644
--- a/functable.h
+++ b/functable.h
@@ -22,12 +22,9 @@ struct functable_s {
     uint32_t (* crc32_fold_final)   (struct crc32_fold_s *crc);
     uint32_t (* crc32_fold_reset)   (struct crc32_fold_s *crc);
     void     (* inflate_fast)       (PREFIX3(stream) *strm, uint32_t start);
-    void     (* insert_string)      (deflate_state *const s, uint32_t str, uint32_t count);
     uint32_t (* longest_match)      (deflate_state *const s, Pos cur_match);
     uint32_t (* longest_match_slow) (deflate_state *const s, Pos cur_match);
-    Pos      (* quick_insert_string)(deflate_state *const s, uint32_t str);
     void     (* slide_hash)         (deflate_state *s);
-    uint32_t (* update_hash)        (uint32_t h, uint32_t val);
 };
 
 Z_INTERNAL extern struct functable_s functable;
diff --git a/arch/generic/insert_string_c.c b/insert_string.c
similarity index 76%
rename from arch/generic/insert_string_c.c
rename to insert_string.c
index 2c6631e1c6..11a5b97ffe 100644
--- a/arch/generic/insert_string_c.c
+++ b/insert_string.c
@@ -14,8 +14,8 @@
 #define HASH_CALC_VAR        h
 #define HASH_CALC_VAR_INIT   uint32_t h = 0
 
-#define UPDATE_HASH          update_hash_c
-#define INSERT_STRING        insert_string_c
-#define QUICK_INSERT_STRING  quick_insert_string_c
+#define UPDATE_HASH          update_hash
+#define INSERT_STRING        insert_string
+#define QUICK_INSERT_STRING  quick_insert_string
 
 #include "insert_string_tpl.h"
diff --git a/win32/Makefile.a64 b/win32/Makefile.a64
index ecaaaa93e9..944270b3d5 100644
--- a/win32/Makefile.a64
+++ b/win32/Makefile.a64
@@ -67,7 +67,7 @@ OBJS = \
 	infback.obj \
 	inflate.obj \
 	inftrees.obj \
-	insert_string_c.obj \
+	insert_string.obj \
 	insert_string_roll.obj \
 	slide_hash_c.obj \
 	trees.obj \
@@ -99,7 +99,7 @@ WFLAGS = $(WFLAGS) \
 	-DARM_NEON \
 	-DARM_NOCHECK_NEON \
 	#
-OBJS = $(OBJS) crc32_acle.obj insert_string_acle.obj adler32_neon.obj chunkset_neon.obj compare256_neon.obj slide_hash_neon.obj
+OBJS = $(OBJS) crc32_acle.obj adler32_neon.obj chunkset_neon.obj compare256_neon.obj slide_hash_neon.obj
 
 # targets
 all: $(STATICLIB) $(SHAREDLIB) $(IMPLIB) \
@@ -208,7 +208,7 @@ deflate_stored.obj: $(SRCDIR)/deflate_stored.c $(SRCDIR)/zbuild.h $(SRCDIR)/defl
 infback.obj: $(SRCDIR)/infback.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h
 inflate.obj: $(SRCDIR)/inflate.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h $(SRCDIR)/functable.h
 inftrees.obj: $(SRCDIR)/inftrees.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h
-insert_string_c.obj: $(SRCDIR)/arch/generic/insert_string_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
+insert_string.obj: $(SRCDIR)/insert_string.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
 slide_hash_c.obj: $(SRCDIR)/arch/generic/slide_hash_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h
 slide_hash_neon.obj: $(SRCDIR)/arch/arm/slide_hash_neon.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h
 trees.obj: $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/trees_tbl.h
diff --git a/win32/Makefile.arm b/win32/Makefile.arm
index 79ff7a5778..a88ede793d 100644
--- a/win32/Makefile.arm
+++ b/win32/Makefile.arm
@@ -72,7 +72,7 @@ OBJS = \
 	infback.obj \
 	inflate.obj \
 	inftrees.obj \
-	insert_string_c.obj \
+	insert_string.obj \
 	insert_string_roll.obj \
 	slide_hash_c.obj \
 	trees.obj \
@@ -100,7 +100,7 @@ OBJS = $(OBJS) gzlib.obj gzread.obj gzwrite.obj
 
 !if "$(WITH_ACLE)" != ""
 WFLAGS = $(WFLAGS) -DARM_ACLE
-OBJS = $(OBJS) crc32_acle.obj insert_string_acle.obj
+OBJS = $(OBJS) crc32_acle.obj
 !endif
 !if "$(WITH_VFPV3)" != ""
 NEON_ARCH = /arch:VFPv3
@@ -229,7 +229,7 @@ deflate_stored.obj: $(SRCDIR)/deflate_stored.c $(SRCDIR)/zbuild.h $(SRCDIR)/defl
 infback.obj: $(SRCDIR)/infback.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h
 inflate.obj: $(SRCDIR)/inflate.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h $(SRCDIR)/functable.h
 inftrees.obj: $(SRCDIR)/inftrees.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h
-insert_string_c.obj: $(SRCDIR)/arch/generic/insert_string_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
+insert_string.obj: $(SRCDIR)/insert_string.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
 slide_hash_c.obj: $(SRCDIR)/arch/generic/slide_hash_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h
 trees.obj: $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/trees_tbl.h
 zutil.obj: $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/zutil_p.h
diff --git a/win32/Makefile.msc b/win32/Makefile.msc
index 9bde54841b..6d9abf2a72 100644
--- a/win32/Makefile.msc
+++ b/win32/Makefile.msc
@@ -80,9 +80,8 @@ OBJS = \
 	infback.obj \
 	inflate.obj \
 	inftrees.obj \
-	insert_string_c.obj \
+	insert_string.obj \
 	insert_string_roll.obj \
-	insert_string_sse42.obj \
 	slide_hash_c.obj \
 	slide_hash_avx2.obj \
 	slide_hash_sse2.obj \
@@ -231,9 +230,8 @@ deflate_stored.obj: $(SRCDIR)/deflate_stored.c $(SRCDIR)/zbuild.h $(SRCDIR)/defl
 infback.obj: $(SRCDIR)/infback.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h
 inflate.obj: $(SRCDIR)/inflate.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h $(SRCDIR)/inflate.h $(SRCDIR)/inflate_p.h $(SRCDIR)/functable.h $(SRCDIR)/functable.h $(SRCDIR)/functable.h
 inftrees.obj: $(SRCDIR)/inftrees.c $(SRCDIR)/zbuild.h $(SRCDIR)/zutil.h $(SRCDIR)/inftrees.h
-insert_string_c.obj: $(SRCDIR)/arch/generic/insert_string_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
+insert_string.obj: $(SRCDIR)/insert_string.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
 insert_string_roll.obj: $(SRCDIR)/insert_string_roll.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
-insert_string_sse42.obj: $(SRCDIR)/arch/x86/insert_string_sse42.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h $(SRCDIR)/insert_string_tpl.h
 slide_hash_c.obj: $(SRCDIR)/arch/generic/slide_hash_c.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h
 slide_hash_avx2.obj: $(SRCDIR)/arch/x86/slide_hash_avx2.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h
 slide_hash_sse2.obj: $(SRCDIR)/arch/x86/slide_hash_sse2.c $(SRCDIR)/zbuild.h $(SRCDIR)/deflate.h