Compilation speed (#546)

Speed up compilation

Standard C++ headers contribute a lot to compilation time. Avoid algorithm
and sstream in frequently used headers.

include/my_dbug.h

@@ -195,10 +195,14 @@ void debug_sync_point(const char* lock_name, uint lock_timeout);
 
 #ifdef __cplusplus
 }
+/*
+  DBUG_LOG() was initially intended for InnoDB. To be able to use it elsewhere
+  one should #include <sstream>. We intentially avoid including it here to save
+  compilation time.
+*/
 # ifdef DBUG_OFF
 #  define DBUG_LOG(keyword, v) do {} while (0)
 # else
-#  include <sstream>
 #  define DBUG_LOG(keyword, v) do { \
   if (_db_pargs_(__LINE__, keyword)) { \
     std::ostringstream _db_s; _db_s << v; \

sql/item_func.cc

@@ -2889,7 +2889,7 @@ bool Item_func_min_max::get_date(MYSQL_TIME *ltime, ulonglong fuzzy_date)
     ltime->hour+= (ltime->month * 32 + ltime->day) * 24;
     ltime->year= ltime->month= ltime->day= 0;
     if (adjust_time_range_with_warn(ltime,
-                                    std::min<uint>(decimals, TIME_SECOND_PART_DIGITS)))
+                                    MY_MIN(decimals, TIME_SECOND_PART_DIGITS)))
       return (null_value= true);
   }
 

sql/item_sum.cc

@@ -2257,7 +2257,7 @@ bool Item_sum_bit::remove_as_window(ulonglong value)
   }
 
   // Prevent overflow;
-  num_values_added = std::min(num_values_added, num_values_added - 1);
+  num_values_added = MY_MIN(num_values_added, num_values_added - 1);
   set_bits_from_counters();
   return 0;
 }
@@ -2270,7 +2270,7 @@ bool Item_sum_bit::add_as_window(ulonglong value)
     bit_counters[i]+= (value & (1ULL << i)) ? 1 : 0;
   }
   // Prevent overflow;
-  num_values_added = std::max(num_values_added, num_values_added + 1);
+  num_values_added = MY_MAX(num_values_added, num_values_added + 1);
   set_bits_from_counters();
   return 0;
 }

sql/key.cc

@@ -21,9 +21,6 @@
 #include "key.h"                                // key_rec_cmp
 #include "field.h"                              // Field
 
-using std::min;
-using std::max;
-
 /*
   Search after a key that starts with 'field'
 
@@ -135,7 +132,7 @@ void key_copy(uchar *to_key, uchar *from_record, KEY *key_info,
           Don't copy data for null values
           The -1 below is to subtract the null byte which is already handled
         */
-        length= min<uint>(key_length, key_part->store_length-1);
+        length= MY_MIN(key_length, key_part->store_length-1);
         if (with_zerofill)
           bzero((char*) to_key, length);
         continue;
@@ -145,7 +142,7 @@ void key_copy(uchar *to_key, uchar *from_record, KEY *key_info,
         key_part->key_part_flag & HA_VAR_LENGTH_PART)
     {
       key_length-= HA_KEY_BLOB_LENGTH;
-      length= min<uint>(key_length, key_part->length);
+      length= MY_MIN(key_length, key_part->length);
       uint bytes= key_part->field->get_key_image(to_key, length, Field::itRAW);
       if (with_zerofill && bytes < length)
         bzero((char*) to_key + bytes, length - bytes);
@@ -153,7 +150,7 @@ void key_copy(uchar *to_key, uchar *from_record, KEY *key_info,
     }
     else
     {
-      length= min<uint>(key_length, key_part->length);
+      length= MY_MIN(key_length, key_part->length);
       Field *field= key_part->field;
       CHARSET_INFO *cs= field->charset();
       uint bytes= field->get_key_image(to_key, length, Field::itRAW);
@@ -205,7 +202,7 @@ void key_restore(uchar *to_record, const uchar *from_key, KEY *key_info,
           Don't copy data for null bytes
           The -1 below is to subtract the null byte which is already handled
         */
-        length= min<uint>(key_length, key_part->store_length-1);
+        length= MY_MIN(key_length, key_part->store_length-1);
         continue;
       }
     }
@@ -247,7 +244,7 @@ void key_restore(uchar *to_record, const uchar *from_key, KEY *key_info,
       my_ptrdiff_t ptrdiff= to_record - field->table->record[0];
       field->move_field_offset(ptrdiff);
       key_length-= HA_KEY_BLOB_LENGTH;
-      length= min<uint>(key_length, key_part->length);
+      length= MY_MIN(key_length, key_part->length);
       old_map= dbug_tmp_use_all_columns(field->table, field->table->write_set);
       field->set_key_image(from_key, length);
       dbug_tmp_restore_column_map(field->table->write_set, old_map);
@@ -256,7 +253,7 @@ void key_restore(uchar *to_record, const uchar *from_key, KEY *key_info,
     }
     else
     {
-      length= min<uint>(key_length, key_part->length);
+      length= MY_MIN(key_length, key_part->length);
       /* skip the byte with 'uneven' bits, if used */
       memcpy(to_record + key_part->offset, from_key + used_uneven_bits
              , (size_t) length - used_uneven_bits);
@@ -314,7 +311,7 @@ bool key_cmp_if_same(TABLE *table,const uchar *key,uint idx,uint key_length)
 	return 1;
       continue;
     }
-    length= min((uint) (key_end-key), store_length);
+    length= MY_MIN((uint) (key_end-key), store_length);
     if (!(key_part->key_type & (FIELDFLAG_NUMBER+FIELDFLAG_BINARY+
                                 FIELDFLAG_PACK)))
     {
@@ -392,7 +389,7 @@ void field_unpack(String *to, Field *field, const uchar *rec, uint max_length,
         tmp.length(charpos);
     }
     if (max_length < field->pack_length())
-      tmp.length(min(tmp.length(),max_length));
+      tmp.length(MY_MIN(tmp.length(),max_length));
     ErrConvString err(&tmp);
     to->append(err.ptr());
   }

sql/log.cc

@@ -7044,7 +7044,7 @@ int MYSQL_BIN_LOG::write_cache(THD *thd, IO_CACHE *cache)
           int4store(ev + EVENT_LEN_OFFSET, ev_len + writer.checksum_len);
 
           writer.remains= ev_len;
-          if (writer.write(ev, std::min<uint>(ev_len, length - hdr_offs)))
+          if (writer.write(ev, MY_MIN(ev_len, length - hdr_offs)))
             DBUG_RETURN(ER_ERROR_ON_WRITE);
 
           /* next event header at ... */

sql/log_event.cc

@@ -55,8 +55,6 @@
 
 #define my_b_write_string(A, B) my_b_write((A), (uchar*)(B), (uint) (sizeof(B) - 1))
 
-using std::max;
-
 /**
   BINLOG_CHECKSUM variable.
 */
@@ -1777,7 +1775,7 @@ int Log_event::read_log_event(IO_CACHE* file, String* packet,
   if (data_len < LOG_EVENT_MINIMAL_HEADER_LEN)
     DBUG_RETURN(LOG_READ_BOGUS);
 
-  if (data_len > max(max_allowed_packet,
+  if (data_len > MY_MAX(max_allowed_packet,
                         opt_binlog_rows_event_max_size + MAX_LOG_EVENT_HEADER))
     DBUG_RETURN(LOG_READ_TOO_LARGE);
 

sql/mdl.h

@@ -21,8 +21,6 @@
 #include <mysql_com.h>
 #include <lf.h>
 
-#include <algorithm>
-
 class THD;
 
 class MDL_context;
@@ -373,8 +371,7 @@ class MDL_key
       character set is utf-8, we can safely assume that no
       character starts with a zero byte.
     */
-    using std::min;
-    return memcmp(m_ptr, rhs->m_ptr, min(m_length, rhs->m_length));
+    return memcmp(m_ptr, rhs->m_ptr, MY_MIN(m_length, rhs->m_length));
   }
 
   MDL_key(const MDL_key *rhs)

storage/perfschema/pfs.cc

@@ -41,7 +41,6 @@
 #include "sp_head.h"
 #include "pfs_digest.h"
 
-using std::min;
 /**
   @page PAGE_PERFORMANCE_SCHEMA The Performance Schema main page
   MySQL PERFORMANCE_SCHEMA implementation.
@@ -2022,7 +2021,7 @@ static void set_thread_account_v1(const char *user, int user_len,
   DBUG_ASSERT((host != NULL) || (host_len == 0));
   DBUG_ASSERT(host_len >= 0);
 
-  host_len= min<size_t>(host_len, sizeof(pfs->m_hostname));
+  host_len= MY_MIN(host_len, static_cast<int>(sizeof(pfs->m_hostname)));
 
   if (unlikely(pfs == NULL))
     return;

storage/perfschema/table_threads.cc

@@ -257,7 +257,7 @@ int table_threads::read_row_values(TABLE *table,
              changed to less than or equal to 64 characters.
            */
           set_field_varchar_utf8(f, m_row.m_processlist_state_ptr,
-                                 std::min<uint>(m_row.m_processlist_state_length,
+                                 MY_MIN(m_row.m_processlist_state_length,
                                         f->char_length()));
         }
         else