Finds a Character based on distance and health Announcing the arrival of Valued Associate...
Is CEO the profession with the most psychopaths?
Around usage results
How would a mousetrap for use in space work?
What is the meaning of the simile “quick as silk”?
What would be the ideal power source for a cybernetic eye?
Fantasy story; one type of magic grows in power with use, but the more powerful they are, they more they are drawn to travel to their source
Dating a Former Employee
How does the math work when buying airline miles?
What causes the direction of lightning flashes?
Denied boarding although I have proper visa and documentation. To whom should I make a complaint?
Do square wave exist?
8 Prisoners wearing hats
How to convince students of the implication truth values?
If a contract sometimes uses the wrong name, is it still valid?
Is the Standard Deduction better than Itemized when both are the same amount?
How to find all the available tools in mac terminal?
Why are both D and D# fitting into my E minor key?
Can you use the Shield Master feat to shove someone before you make an attack by using a Readied action?
Should I use a zero-interest credit card for a large one-time purchase?
Why are the trig functions versine, haversine, exsecant, etc, rarely used in modern mathematics?
Does classifying an integer as a discrete log require it be part of a multiplicative group?
When the Haste spell ends on a creature, do attackers have advantage against that creature?
Chinese Seal on silk painting - what does it mean?
また usage in a dictionary
Finds a Character based on distance and health
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Euclidian distance - optimization and castingSpeed, distance and time calculatorFast Document Distance, C++Pairwise distance and residual calculationSplit a character string based on change of characterDistance and force calculation for a molecular dynamics simulationOpenMP SIMD Euclidean DistanceCalculating Euclidean distanceAlgorithm that parses through input of points and finds distanceReads a inFile and grades tests scores and finds max, min, and avg
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}
$begingroup$
I need to improve the efficiency of my program and, using the profiler, have narrowed the problem down to 2 key areas, but I am having trouble coming up with ways to make the program run better.
Based on my profiler's report, it seems to be telling me that my if functions are inefficient. Whats a better way to achieve a better result?
Character* FindAttackTarget() const
{
float weakestHp = FLT_MAX;
Character* weakestEnemy = nullptr;
uint64_t weakestCharId = INT64_MAX;
//Only attack characters that are within attack range
auto& gameChars = m_pGame->m_gameCharacters;
for (size_t i = 0; i < gameChars.size(); ++i)
{
auto& c = gameChars[i];
if (Location.Dist(c.GetLocation()) <= AttackRange &&
c.HP > 0 &&
c.Team != Team)
{
//We want the weakest with the lowest ID number - this keeps consistent results when re-playing the same part of the game (eg. after a load game)
if (c.HP < weakestHp || (c.HP == weakestHp && c.ID < weakestCharId))
{
weakestEnemy = &gameChars[i];
weakestHp = c.HP;
weakestCharId = c.ID;
}
}
}
return weakestEnemy;
}
c++ performance
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
add a comment |
$begingroup$
I need to improve the efficiency of my program and, using the profiler, have narrowed the problem down to 2 key areas, but I am having trouble coming up with ways to make the program run better.
Based on my profiler's report, it seems to be telling me that my if functions are inefficient. Whats a better way to achieve a better result?
Character* FindAttackTarget() const
{
float weakestHp = FLT_MAX;
Character* weakestEnemy = nullptr;
uint64_t weakestCharId = INT64_MAX;
//Only attack characters that are within attack range
auto& gameChars = m_pGame->m_gameCharacters;
for (size_t i = 0; i < gameChars.size(); ++i)
{
auto& c = gameChars[i];
if (Location.Dist(c.GetLocation()) <= AttackRange &&
c.HP > 0 &&
c.Team != Team)
{
//We want the weakest with the lowest ID number - this keeps consistent results when re-playing the same part of the game (eg. after a load game)
if (c.HP < weakestHp || (c.HP == weakestHp && c.ID < weakestCharId))
{
weakestEnemy = &gameChars[i];
weakestHp = c.HP;
weakestCharId = c.ID;
}
}
}
return weakestEnemy;
}
c++ performance
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago
add a comment |
$begingroup$
I need to improve the efficiency of my program and, using the profiler, have narrowed the problem down to 2 key areas, but I am having trouble coming up with ways to make the program run better.
Based on my profiler's report, it seems to be telling me that my if functions are inefficient. Whats a better way to achieve a better result?
Character* FindAttackTarget() const
{
float weakestHp = FLT_MAX;
Character* weakestEnemy = nullptr;
uint64_t weakestCharId = INT64_MAX;
//Only attack characters that are within attack range
auto& gameChars = m_pGame->m_gameCharacters;
for (size_t i = 0; i < gameChars.size(); ++i)
{
auto& c = gameChars[i];
if (Location.Dist(c.GetLocation()) <= AttackRange &&
c.HP > 0 &&
c.Team != Team)
{
//We want the weakest with the lowest ID number - this keeps consistent results when re-playing the same part of the game (eg. after a load game)
if (c.HP < weakestHp || (c.HP == weakestHp && c.ID < weakestCharId))
{
weakestEnemy = &gameChars[i];
weakestHp = c.HP;
weakestCharId = c.ID;
}
}
}
return weakestEnemy;
}
c++ performance
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I need to improve the efficiency of my program and, using the profiler, have narrowed the problem down to 2 key areas, but I am having trouble coming up with ways to make the program run better.
Based on my profiler's report, it seems to be telling me that my if functions are inefficient. Whats a better way to achieve a better result?
Character* FindAttackTarget() const
{
float weakestHp = FLT_MAX;
Character* weakestEnemy = nullptr;
uint64_t weakestCharId = INT64_MAX;
//Only attack characters that are within attack range
auto& gameChars = m_pGame->m_gameCharacters;
for (size_t i = 0; i < gameChars.size(); ++i)
{
auto& c = gameChars[i];
if (Location.Dist(c.GetLocation()) <= AttackRange &&
c.HP > 0 &&
c.Team != Team)
{
//We want the weakest with the lowest ID number - this keeps consistent results when re-playing the same part of the game (eg. after a load game)
if (c.HP < weakestHp || (c.HP == weakestHp && c.ID < weakestCharId))
{
weakestEnemy = &gameChars[i];
weakestHp = c.HP;
weakestCharId = c.ID;
}
}
}
return weakestEnemy;
}
c++ performance
c++ performance
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
AtazirAtazir
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 4 hours ago
AtazirAtazir
61
asked 4 hours ago
AtazirAtazir
61
61
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Atazir is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago
add a comment |
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago
add a comment |
1 Answer
1
active
oldest
votes
$begingroup$
The tests c.HP > 0 and c.Team != Team are probably blazingly fast tests. Location.Dist(c.GetLocation()) <= AttackRange probably involves the square-root of the sum of the squares of the difference of coordinates in two or three dimensions. Plus, GetLocation() may involve memory allocation and/or copying constructors. It is by far the slowest test, yet you are testing it first! Take advantage of the short-circuit logical and operators by reordering the tests so the fastest tests are done first, so the slowest test may not even need to be executed, resulting in faster execution.
Bonus: the square-root can be avoided; simply compute the square distance, and compare against the $AttackRange^2$ (computed outside of the loop) for another speed gain.
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
$endgroup$
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "196"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Atazir is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f217649%2ffinds-a-character-based-on-distance-and-health%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
The tests c.HP > 0 and c.Team != Team are probably blazingly fast tests. Location.Dist(c.GetLocation()) <= AttackRange probably involves the square-root of the sum of the squares of the difference of coordinates in two or three dimensions. Plus, GetLocation() may involve memory allocation and/or copying constructors. It is by far the slowest test, yet you are testing it first! Take advantage of the short-circuit logical and operators by reordering the tests so the fastest tests are done first, so the slowest test may not even need to be executed, resulting in faster execution.
Bonus: the square-root can be avoided; simply compute the square distance, and compare against the $AttackRange^2$ (computed outside of the loop) for another speed gain.
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
$endgroup$
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
add a comment |
$begingroup$
The tests c.HP > 0 and c.Team != Team are probably blazingly fast tests. Location.Dist(c.GetLocation()) <= AttackRange probably involves the square-root of the sum of the squares of the difference of coordinates in two or three dimensions. Plus, GetLocation() may involve memory allocation and/or copying constructors. It is by far the slowest test, yet you are testing it first! Take advantage of the short-circuit logical and operators by reordering the tests so the fastest tests are done first, so the slowest test may not even need to be executed, resulting in faster execution.
Bonus: the square-root can be avoided; simply compute the square distance, and compare against the $AttackRange^2$ (computed outside of the loop) for another speed gain.
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
$endgroup$
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
add a comment |
$begingroup$
The tests c.HP > 0 and c.Team != Team are probably blazingly fast tests. Location.Dist(c.GetLocation()) <= AttackRange probably involves the square-root of the sum of the squares of the difference of coordinates in two or three dimensions. Plus, GetLocation() may involve memory allocation and/or copying constructors. It is by far the slowest test, yet you are testing it first! Take advantage of the short-circuit logical and operators by reordering the tests so the fastest tests are done first, so the slowest test may not even need to be executed, resulting in faster execution.
Bonus: the square-root can be avoided; simply compute the square distance, and compare against the $AttackRange^2$ (computed outside of the loop) for another speed gain.
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
$endgroup$
The tests c.HP > 0 and c.Team != Team are probably blazingly fast tests. Location.Dist(c.GetLocation()) <= AttackRange probably involves the square-root of the sum of the squares of the difference of coordinates in two or three dimensions. Plus, GetLocation() may involve memory allocation and/or copying constructors. It is by far the slowest test, yet you are testing it first! Take advantage of the short-circuit logical and operators by reordering the tests so the fastest tests are done first, so the slowest test may not even need to be executed, resulting in faster execution.
Bonus: the square-root can be avoided; simply compute the square distance, and compare against the $AttackRange^2$ (computed outside of the loop) for another speed gain.
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
answered 1 hour ago
AJNeufeldAJNeufeld
7,0541723
7,0541723
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
add a comment |
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
$begingroup$
I believe you're on the right track but could expand and systematize your answer: for instance, @Atazir could have gameChars partitioned between enemy and the rest, then have the enemy partition sorted by strength, and last find the first enemy in range: the costly operation is performed on the least number of elements.
$endgroup$
– papagaga
39 mins ago
add a comment |
Atazir is a new contributor. Be nice, and check out our Code of Conduct.
Atazir is a new contributor. Be nice, and check out our Code of Conduct.
Atazir is a new contributor. Be nice, and check out our Code of Conduct.
Atazir is a new contributor. Be nice, and check out our Code of Conduct.
Thanks for contributing an answer to Code Review Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f217649%2ffinds-a-character-based-on-distance-and-health%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
$begingroup$
Which lines are the ones being flagged by the profiler as slow?
$endgroup$
– 1201ProgramAlarm
1 hour ago