regularize options which control size/speed trade

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

7 files changed, 31 insertions, 28 deletions

diff --git a/archival/Config.src b/archival/Config.src
index 9f49081..885cb5b 100644
--- a/archival/Config.src
+++ b/archival/Config.src
@@ -187,15 +187,17 @@ config FEATURE_GZIP_LONG_OPTIONS
 	help
 	  Enable use of long options, increases size by about 106 Bytes
 
-config GZIP_BIG_MEM
-       bool "Trade memory for gzip speed"
-       default n
-       depends on GZIP
-       help
-         Enable big memory options for gzip, including larger I/O
-         buffers and bigger hash tables.  Faster, but uses at least
-         twice as much memory.  Select if speed is more important than
-         memory use.
+config GZIP_FAST
+	int "Trade memory for gzip speed (0:small,slow - 2:fast,big)"
+	default 0
+	range 0 2
+	depends on GZIP
+	help
+	  Enable big memory options for gzip.
+	  0: small buffers, small hash-tables
+	  1: larger buffers, larger hash-tables
+	  2: larger buffers, largest hash-tables
+	  Larger models may give slightly better compression
 
 config LZOP
 	bool "lzop"
@@ -340,15 +342,12 @@ config UNLZMA
 	  is generally considerably better than that achieved by the bzip2
 	  compressors.
 
-	  The BusyBox unlzma applet is limited to de-compression only.
+	  The BusyBox unlzma applet is limited to decompression only.
 	  On an x86 system, this applet adds about 4K.
 
-	  Unless you have a specific application which requires unlzma, you
-	  should probably say N here.
-
 config FEATURE_LZMA_FAST
 	bool "Optimize unlzma for speed"
-	default y
+	default n
 	depends on UNLZMA
 	help
 	  This option reduces decompression time by about 25% at the cost of
diff --git a/archival/bzip2.c b/archival/bzip2.c
index e39d7f7..3dde970 100644
--- a/archival/bzip2.c
+++ b/archival/bzip2.c
@@ -19,7 +19,7 @@
 #include "libbb.h"
 #include "archive.h"
 
-#define CONFIG_BZIP2_FEATURE_SPEED 1
+#define CONFIG_BZIP2_FAST 1
 
 /* Speed test:
  * Compiled with gcc 4.2.1, run on Athlon 64 1800 MHz (512K L2 cache).
@@ -27,7 +27,7 @@
  * (time to compress gcc-4.2.1.tar is 126.4% compared to bbox).
  * At SPEED 5 difference is 32.7%.
  *
- * Test run of all CONFIG_BZIP2_FEATURE_SPEED values on a 11Mb text file:
+ * Test run of all CONFIG_BZIP2_FAST values on a 11Mb text file:
  *     Size   Time (3 runs)
  * 0:  10828  4.145 4.146 4.148
  * 1:  11097  3.845 3.860 3.861
diff --git a/archival/gzip.c b/archival/gzip.c
index 0e0b681..3af930b 100644
--- a/archival/gzip.c
+++ b/archival/gzip.c
@@ -81,10 +81,14 @@ aa:      85.1% -- replaced with aa.gz
 
 /* ===========================================================================
  */
-#if ENABLE_GZIP_BIG_MEM
+#if   CONFIG_GZIP_FAST == 0
+# define SMALL_MEM
+#elif CONFIG_GZIP_FAST == 1
+# define MEDIUM_MEM
+#elif CONFIG_GZIP_FAST == 2
 # define BIG_MEM
 #else
-# define SMALL_MEM
+# error "Invalid CONFIG_GZIP_FAST value"
 #endif
 
 #ifndef INBUFSIZ
diff --git a/archival/libarchive/bz/blocksort.c b/archival/libarchive/bz/blocksort.c
index f70c370..e600cb7 100644
--- a/archival/libarchive/bz/blocksort.c
+++ b/archival/libarchive/bz/blocksort.c
@@ -385,7 +385,7 @@ int mainGtU(
  * but speeds up compression 10% overall
  */
 
-#if CONFIG_BZIP2_FEATURE_SPEED >= 1
+#if CONFIG_BZIP2_FAST >= 1
 
 #define TIMES_8(code) \
 	code; code; code; code; \
@@ -496,7 +496,7 @@ void mainSimpleSort(uint32_t* ptr,
 			i++;
 
 /* 1.5% overall speedup, +290 bytes */
-#if CONFIG_BZIP2_FEATURE_SPEED >= 3
+#if CONFIG_BZIP2_FAST >= 3
 			/*-- copy 2 --*/
 			if (i > hi) break;
 			v = ptr[i];
@@ -750,7 +750,7 @@ void mainSort(EState* state,
 	j = block[0] << 8;
 	i = nblock - 1;
 /* 3%, +300 bytes */
-#if CONFIG_BZIP2_FEATURE_SPEED >= 2
+#if CONFIG_BZIP2_FAST >= 2
 	for (; i >= 3; i -= 4) {
 		quadrant[i] = 0;
 		j = (j >> 8) | (((uint16_t)block[i]) << 8);
@@ -787,7 +787,7 @@ void mainSort(EState* state,
 
 	s = block[0] << 8;
 	i = nblock - 1;
-#if CONFIG_BZIP2_FEATURE_SPEED >= 2
+#if CONFIG_BZIP2_FAST >= 2
 	for (; i >= 3; i -= 4) {
 		s = (s >> 8) | (block[i] << 8);
 		j = ftab[s] - 1;
diff --git a/archival/libarchive/bz/bzlib_private.h b/archival/libarchive/bz/bzlib_private.h
index 6430ce4..43e674b 100644
--- a/archival/libarchive/bz/bzlib_private.h
+++ b/archival/libarchive/bz/bzlib_private.h
@@ -183,7 +183,7 @@ typedef struct EState {
 	/* stack-saving measures: these can be local, but they are too big */
 	int32_t  sendMTFValues__code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
 	int32_t  sendMTFValues__rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
-#if CONFIG_BZIP2_FEATURE_SPEED >= 5
+#if CONFIG_BZIP2_FAST >= 5
 	/* second dimension: only 3 needed; 4 makes index calculations faster */
 	uint32_t sendMTFValues__len_pack[BZ_MAX_ALPHA_SIZE][4];
 #endif
diff --git a/archival/libarchive/bz/compress.c b/archival/libarchive/bz/compress.c
index f936717..e9f1afd 100644
--- a/archival/libarchive/bz/compress.c
+++ b/archival/libarchive/bz/compress.c
@@ -61,7 +61,7 @@ void bsFinishWrite(EState* s)
 /*---------------------------------------------------*/
 static
 /* Helps only on level 5, on other levels hurts. ? */
-#if CONFIG_BZIP2_FEATURE_SPEED >= 5
+#if CONFIG_BZIP2_FAST >= 5
 ALWAYS_INLINE
 #endif
 void bsW(EState* s, int32_t n, uint32_t v)
@@ -331,7 +331,7 @@ void sendMTFValues(EState* s)
 			for (v = 0; v < alphaSize; v++)
 				s->rfreq[t][v] = 0;
 
-#if CONFIG_BZIP2_FEATURE_SPEED >= 5
+#if CONFIG_BZIP2_FAST >= 5
 		/*
 		 * Set up an auxiliary length table which is used to fast-track
 		 * the common case (nGroups == 6).
@@ -361,7 +361,7 @@ void sendMTFValues(EState* s)
 			 */
 			for (t = 0; t < nGroups; t++)
 				cost[t] = 0;
-#if CONFIG_BZIP2_FEATURE_SPEED >= 5
+#if CONFIG_BZIP2_FAST >= 5
 			if (nGroups == 6 && 50 == ge-gs+1) {
 				/*--- fast track the common case ---*/
 				register uint32_t cost01, cost23, cost45;
@@ -420,7 +420,7 @@ void sendMTFValues(EState* s)
 			 * Increment the symbol frequencies for the selected table.
 			 */
 /* 1% faster compress. +800 bytes */
-#if CONFIG_BZIP2_FEATURE_SPEED >= 4
+#if CONFIG_BZIP2_FAST >= 4
 			if (nGroups == 6 && 50 == ge-gs+1) {
 				/*--- fast track the common case ---*/
 #define BZ_ITUR(nn) s->rfreq[bt][mtfv[gs + (nn)]]++
diff --git a/archival/libarchive/bz/huffman.c b/archival/libarchive/bz/huffman.c
index 676b1af..bbec11a 100644
--- a/archival/libarchive/bz/huffman.c
+++ b/archival/libarchive/bz/huffman.c
@@ -48,7 +48,7 @@ in the file LICENSE.
 
 
 /* 90 bytes, 0.3% of overall compress speed */
-#if CONFIG_BZIP2_FEATURE_SPEED >= 1
+#if CONFIG_BZIP2_FAST >= 1
 
 /* macro works better than inline (gcc 4.2.1) */
 #define DOWNHEAP1(heap, weight, Heap) \