source: tests/zombies/string-perf/pbx-correctness-demos.cfa@ e0332dd3

Last change on this file since e0332dd3 was 08ed947, checked in by Michael Brooks <mlbrooks@…>, 4 years ago

Roll up of string changes for performance testing/improvement, and a couple API features supporting them.

String API changes:
Defining a tuning knob to control the heap growth policy (relapaces former 10% hardcode, downgraded to a default)
Implementing findFrom (allowing find-non-first); leaving find as find-first.

String implementation perf improvements:
Calling C-malloc directly instead of via CFA-alloc.
Replacings loops that copy with memmove calls.
Replacings loops that search for a value with memchr calls.

String perf testing realized:
Makefile supporting several prog-*.cfa, chosen by OPERATION value (implies prog.cfa changes to support the adjusted protocol)
Adjusting the starter/accumulater declarations in PEQ and PTA to behave consistently in cfa v cpp.
Adding tests: allocation, find, normalize, pass-by-val, pass-by-x.
Adding helper shell scripts for: generating flame graphs, collecting/crunching allocation stats using Mubeen's malloc wrappers
  • Property mode set to 100644
File size: 6.6 KB
Line 
1// see also C++ investigation in ~/plg2/cfa2/mycode/string/raii/ctor-calls.cpp
2
3#include <string.hfa>
4#include <string_res.hfa>
5
6/*
7call_substrOfPart:
8 In all cases, of both HL and LL, there is a temporary object.
9 It represents narrowing the range, from full-string, to [1..3].
10 The only matter to control is whether that temporary shares edits with the string from which it was created.
11 In HL, two knobs control it, and the
12*/
13
14void calltest_HL() {
15
16 #define HELPER_BODY(param) \
17 sout | "early in helper with " | param; \
18 param[0] = '+'; \
19 sout | "late in helper with " | param;
20
21 void helper1( string q ) { HELPER_BODY(q) }
22 void helper2( string & q ) { HELPER_BODY(q) }
23 #undef HELPER_BODY
24
25 string fred;
26
27
28 sout | "===";
29 sout | "HL: substring of part";
30
31 sout | "---";
32 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
33 fred = "abcd";
34 sout | "before helper with " | fred;
35 helper1( fred(1,3) );
36 sout | "after helper with " | fred;
37
38 sout | "---";
39 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
40 fred = "abcd";
41 sout | "before helper with " | fred;
42 helper2( fred(1,3) );
43 sout | "after helper with " | fred;
44
45 sout | "---";
46 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
47 fred = "abcd";
48 sout | "before helper with " | fred;
49 helper2( (string){ fred(1,3) } );
50 sout | "after helper with " | fred;
51
52
53 sout | "===";
54 sout | "HL: substring of whole";
55
56 sout | "---";
57 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
58 fred = "abcd";
59 sout | "before helper with " | fred;
60 helper1( fred(0,4) );
61 sout | "after helper with " | fred;
62
63 sout | "---";
64 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
65 fred = "abcd";
66 sout | "before helper with " | fred;
67 helper2( fred(0,4) );
68 sout | "after helper with " | fred;
69
70 sout | "---";
71 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
72 fred = "abcd";
73 sout | "before helper with " | fred;
74 helper2( (string){ fred(0,4) } );
75 sout | "after helper with " | fred;
76
77
78
79 sout | "===";
80 sout | "HL: whole original string";
81
82 sout | "---";
83 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
84 fred = "abcd";
85 sout | "before helper with " | fred;
86 helper1( fred );
87 sout | "after helper with " | fred;
88
89 sout | "---";
90 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
91 fred = "abcd";
92 sout | "before helper with " | fred;
93 helper2( fred );
94 sout | "after helper with " | fred;
95
96 sout | "---";
97 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
98 fred = "abcd";
99 sout | "before helper with " | fred;
100 helper2( (string){ fred } );
101 sout | "after helper with " | fred;
102}
103
104void calltest_LL() {
105
106 #define HELPER_BODY(param) \
107 sout | "early in helper with " | param; \
108 assignAt(param, 0, '+'); \
109 sout | "late in helper with " | param;
110
111 void helper1( string_res & q ) { HELPER_BODY(q) } // arg should always be a temporary constructed with COPY_VALUE
112 void helper2( string_res & q ) { HELPER_BODY(q) } // arg can refer to whatever you want
113 #undef HELPER_BODY
114
115 /*
116 In LL, both functions are translated to the same thing.
117 "The only allowed call of #1" becomes respecting the restriction of the comment at helper1.
118 A sys call of #2 is different from the only allowed call of #1.
119 A trans call of #2 is the same as the only allowed call of #1.
120 */
121
122 string_res fred;
123
124 sout | "===";
125 sout | "LL: substring of part";
126
127 sout | "---";
128 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
129 fred = "abcd";
130 sout | "before helper with " | fred;
131 helper1( (string_res){ fred, COPY_VALUE, 1, 3 } );
132 sout | "after helper with " | fred;
133
134 sout | "---";
135 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
136 fred = "abcd";
137 sout | "before helper with " | fred;
138 helper2( (string_res){ fred, SHARE_EDITS, 1, 3 } );
139 sout | "after helper with " | fred;
140
141 sout | "---";
142 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
143 fred = "abcd";
144 sout | "before helper with " | fred;
145 helper2( (string_res){ fred, COPY_VALUE, 1, 3 } );
146 sout | "after helper with " | fred;
147
148
149 sout | "===";
150 sout | "LL: substring of whole";
151
152 sout | "---";
153 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
154 fred = "abcd";
155 sout | "before helper with " | fred;
156 helper1( (string_res){ fred, COPY_VALUE, 0, 4 } );
157 sout | "after helper with " | fred;
158
159 sout | "---";
160 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
161 fred = "abcd";
162 sout | "before helper with " | fred;
163 helper2( (string_res){ fred, SHARE_EDITS, 0, 4 } );
164 sout | "after helper with " | fred;
165
166 sout | "---";
167 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
168 fred = "abcd";
169 sout | "before helper with " | fred;
170 helper2( (string_res){ fred, COPY_VALUE, 0, 4 } );
171 sout | "after helper with " | fred;
172
173
174 sout | "===";
175 sout | "LL: whole original string";
176
177 sout | "---";
178 // Calling a by-val function, the only way it supports, in which it gets a private logical copy.
179 fred = "abcd";
180 sout | "before helper with " | fred;
181 helper1( (string_res){ fred, COPY_VALUE } );
182 sout | "after helper with " | fred;
183
184 sout | "---";
185 // Calling a by-ref function, sys-style, in which we want to gets its changes as side effects.
186 fred = "abcd";
187 sout | "before helper with " | fred;
188 helper2( fred );
189 sout | "after helper with " | fred;
190
191 sout | "---";
192 // Calling a by-ref function, trans-style, in which we give it a logical copy, to prevent it from pulluting our gold one.
193 fred = "abcd";
194 sout | "before helper with " | fred;
195 helper2( (string_res){ fred, COPY_VALUE } );
196 sout | "after helper with " | fred;
197}
198
199
200
201int main() {
202
203 calltest_HL();
204 calltest_LL();
205
206}
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