【Question】How to improve wifi send data rate？

[Yongxiang]

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1. while(true){
2.         if(status == WIFI_CONNECTED){
3.             //the raw buffer len must be <= 1500 Bytes and >= 24 Bytes
4.         err = esp_wifi_80211_tx(WIFI_IF_AP, ds2ds_pdu, sizeof(ds2ds_pdu), true);
5.         ESP_LOGE(TAG, "Send wifi data. (%s)", esp_err_to_name(err));  
6.             //sys_delay_ms(1000);
7.         }
8.     else{
9.         sys_delay_ms(5000);
10.         printf("continue... \n");
11.     }
12.     }

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This is the code for sending wifi data frame continuously. But I can't get the ideal rate because of the err "(ESP_ERR_NO_MEM)". The result as follow. How can I resolve this question? The actual valid rate is about 720kbps which is too low. Why does the API "esp_wifi_80211_tx" send data so slowly?
Thanks for anyone answer my question!

err result

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